9/11 Debris: Investigation of Ground Zero, Pt. 1

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A RARE VIEW OF GROUND ZERO ON 9-16-01.avi

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Exotic High Tech Explosives Positively Identified in World Trade Center Dust

This is a rehash of an old article with reference to

Arthur Scheuerman's long winded comments.

911: Melted Steel & Concrete from WTC6

Exotic High Tech Explosives Positively Identified in World Trade Center Dust

Some long winded comments, usually copy/paste, by Arthur Scheuerman that I have copied from Dagorret. I'm familiar with Arthur Scheuerman, as I have seen him on many blogs, as well as my own, but I don't have the froggiest idea who Robin is. I can say, though, that his information and bias looks like someone from NIST. or a shill from JREF, like Mackey or Gravy. Please note that many of these posts appear three times. Don't know why, but they're tripled, and as Walter Kronkite once said, "and that's the way it is".




 Dagorret.

April 8, 2009

in World

A ground-breaking scientific paper confirmed this week that red-gray flakes found throughout multiple samples of WTC dust are actually unexploded fragments of nanothermite, an exotic high-tech explosive.

The samples were taken from far-separated locations in Manhattan, some as early as 10 minutes after the second tower (WTC 1) collapsed, ruling out any possible contamination from cleanup operations.

Authored by an international team of physicists, chemists, and others, the research paper was titled “Active Thermitic Material Discovered in Dust from the 9/11 World Trade Center Catastrophe.” It was published in The Open Chemical Physics Journal, 2009, Vol. 2., and is available online for free download. The lead author is Niels H. Harrit of the Department of Chemistry, University of Copenhagen.

The paper ends with the statement, “Based on these observations, we conclude that the red layer of the red/gray chips we have discovered in the WTC dust is active, unreacted thermitic material, incorporating nanotechnology, and is a highly energetic pyrotechnic or explosive material.”

Ordinary thermite burns quickly and can melt through steel, but it is not explosive. Nanothermite, however, can be formulated as a high explosive. It is stable when wet and can be applied like paint.

The presence of pre-planted explosives in the WTC buildings calls into question the official story that the buildings were destroyed by the airplane collisions and fire alone. The National Institute of Standards and Technology (NIST), the official government agency that investigated the building collapses, did not test for residues of explosives.

Richard Gage, AIA, said, “This peer-reviewed scientific study of the disturbing contents of the WTC dust is yet another smoking gun proving to the over 600 Architects & Engineers for 9/11 Truth (AE911Truth) who I represent that a real investigation must be carried out immediately as to the actual cause of the destruction of the 3 WTC high-rises on 9/11.”

One of the paper’s co-authors is AE911Truth researcher/editor Gregg Roberts. When Roberts signed the AE911Truth petition demanding a new 9/11 investigation, he wrote, “What struck me on 9/11 was how much dust was created.” Now, over 7 years later, Roberts has an intimate appreciation for that dust. The steel was removed and destroyed very quickly after the catastrophe, despite loud protests from fire fighters and others. It was destruction of the primary evidence at a crime scene. The dust, however, remains as a key piece of physical evidence.

The nine coauthors are Niels H. Harrit, Department of Chemistry, University of Copenhagen, Denmark, Jeffrey Farrer, Department of Physics and Astronomy, Brigham Young University, Steven E. Jones, S&J Scientific Co., Provo, UT, Kevin R. Ryan, 9/11 Working Group of Bloomington, Bloomington, IN, Frank M. Legge, Logical Systems Consulting, Perth, Western Australia, Daniel Farnsworth, Department of Physics and Astronomy, Brigham Young University, Gregg Roberts, Architects & Engineers for 9/11 Truth, Berkeley, CA, James R. Gourley, International Center for 9/11 Studies, Dallas, TX, and Bradley R. Larsen, S&J Scientific Co., Provo, UT.

Source: AE911Truth

UPDATE

Thanks to the readers to the following contributions:

Why Indeed Did the WTC Buildings Completely Collapse? – By Dr. Steven E. Jones Physicist and Archaeometrist

Linear Thermite Cutting Charges (Video)

89 comments… read them below or add one

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Exotic High Tech Explosives Positively Identified in World Trade Center Dust

Editors Note

I have removed all of the duplicated comments in 
order to make this more readable. This being done,
the whole thing is very long winded, especially the
overly long comment by Arthur Scheuerman...G%








1 Robin April 8, 2009 at 7:03 am
I read the report and it looks biased to me. I will have to do some more background checks of the references but in my experience there are still questions about the data as presented in this paper.



One of the things that makes me wonder about the paper is sentences like this.



"All of the dust samples that were inspected were found to

contain red/gray chips. The chips are characterized by a red layer in which XEDS analysis identifies carbon, oxygen, aluminum, silicon, and iron, and a gray layer in which mainly iron and oxygen are found."



Also there are comments about adding oxygen to the mix. You just don't add oxygen to metal. Iron when it reacts with water will turn to Iron Oxide which is rust. Watch a cast iron frying pan that has been scrubbed clean and left on a counter. It will start showing rust within minutes of the surface water evaporating. It turns red.



There was a lot of force involved with the collapse of the two towers. This force would tend to vaporize all kinds of metals and materials into very fine particles. These particles would then be spread all over surrounding area.



Search the archives about research into the reactions of steel in fires. In the UK, this was highlighted with severe damage to an office building where the there were charges in regards to arson. It turned out that the fire had softened the steel, not melted it using just a normal office material fire. Fire investigators had a chance to replicate the fire on a building that was going to be demolished and the steel beams did bend. This was done before 911 and the first time I saw it was on TV.



There is research being done in the UK on how fires affect structures using full scale models.



Last, use your own eyes. Look at any of the videos of the collapse of the towers. Watch how the top of the towers started to fall to one side and then get pulled back straight.



To use an example, take a string and lay it out on a floor. Start pushing it and it will not go straight but start to bunch up. Then pull the string and it will pull itself into a straight line.



It is just like the plane at the pentagon, no normal (non-highspeed) video camera will capture a plane on video at the speed it hit.



And don't forget that common kitchen flour in a fine powder will explode and bring down buildings. Look at the number of grain elevators that have exploded in the past.



http://en.wikipedia.org/wiki/Flour_bomb

Have a good day.

 Reply



2 Sue April 8, 2009 at 1:53 pm
"In the UK, this was highlighted with severe damage to an office building where the there were charges in regards to arson. It turned out that the fire had softened the steel, not melted it using just a normal office material fire. Fire investigators had a chance to replicate the fire on a building that was going to be demolished and the steel beams did bend. This was done before 911 and the first time I saw it was on TV."



But don't you find it odd that BOTH WTC1 and 2 went down in a demolishion fashion? That even if the steel was melted and bent from burning fuel from the aircrafts that physics makes it impossible for BOTH WTCs to fall in that manner in that they imploded on themselves? Not to mention that they fell so quickly after being hit by the aircrafts and fell within 46 minutes of each other.



That aside, how does one explain the fall of WTC7? It was not hit by an aircraft. There is no way that falling debris from the WTC1 and 2 could cause that much damage in that WTC7 would collapse. There is no way that a fire caused that building to collapse:http://www.serendipity.li/wot/other_fires/other_fires.htm (see other buildings that did not collapse under MUCH greater circumstances).

Reply




3 Robin April 8, 2009 at 2:03 pm
I read the report and it looks biased to me. I will have to do some more background checks of the references but in my experience there are still questions about the data as presented in this paper.

One of the things that makes me wonder about the paper is sentences like this.

“All of the dust samples that were inspected were found to
contain red/gray chips. The chips are characterized by a red layer in which XEDS analysis identifies carbon, oxygen, aluminum, silicon, and iron, and a gray layer in which mainly iron and oxygen are found.”

Also there are comments about adding oxygen to the mix. You just don’t add oxygen to metal. Iron when it reacts with water will turn to Iron Oxide which is rust. Watch a cast iron frying pan that has been scrubbed clean and left on a counter. It will start showing rust within minutes of the surface water evaporating. It turns red.

There was a lot of force involved with the collapse of the two towers. This force would tend to vaporize all kinds of metals and materials into very fine particles. These particles would then be spread all over surrounding area.

Search the archives about research into the reactions of steel in fires. In the UK, this was highlighted with severe damage to an office building where the there were charges in regards to arson. It turned out that the fire had softened the steel, not melted it using just a normal office material fire. Fire investigators had a chance to replicate the fire on a building that was going to be demolished and the steel beams did bend. This was done before 911 and the first time I saw it was on TV.

There is research being done in the UK on how fires affect structures using full scale models.

Last, use your own eyes. Look at any of the videos of the collapse of the towers. Watch how the top of the towers started to fall to one side and then get pulled back straight.

To use an example, take a string and lay it out on a floor. Start pushing it and it will not go straight but start to bunch up. Then pull the string and it will pull itself into a straight line.

It is just like the plane at the pentagon, no normal (non-highspeed) video camera will capture a plane on video at the speed it hit.

And don’t forget that common kitchen flour in a fine powder will explode and bring down buildings. Look at the number of grain elevators that have exploded in the past.

http://en.wikipedia.org/wiki/Flour_bomb

Have a good day.

Reply




7 Sue April 8, 2009 at 8:53 pm
“In the UK, this was highlighted with severe damage to an office building where the there were charges in regards to arson. It turned out that the fire had softened the steel, not melted it using just a normal office material fire. Fire investigators had a chance to replicate the fire on a building that was going to be demolished and the steel beams did bend. This was done before 911 and the first time I saw it was on TV.”

But don’t you find it odd that BOTH WTC1 and 2 went down in a demolishion fashion? That even if the steel was melted and bent from burning fuel from the aircrafts that physics makes it impossible for BOTH WTCs to fall in that manner in that they imploded on themselves? Not to mention that they fell so quickly after being hit by the aircrafts and fell within 46 minutes of each other.

That aside, how does one explain the fall of WTC7? It was not hit by an aircraft. There is no way that falling debris from the WTC1 and 2 could cause that much damage in that WTC7 would collapse. There is no way that a fire caused that building to collapse: http://www.serendipity.li/wot/other_fires/other_fires.htm (see other buildings that did not collapse under MUCH greater circumstances).

Reply



10 Robin April 9, 2009 at 8:25 am
How many of these buildings had been impacted by a jet plane?



How many of them were built with the wide open design of the WTC towers? Now secondary support columns for the individual floors.



I did look at these sites over the years and I cannot find a single building that was subjected to the same stresses and forces as well as structural damage as the WTC's were.



Seeing the video of the pieces of planes shooting through the other side of the buildings is enough for me to believe that there was some severe damage inside.



For those that don't believe in the effect of heat and steel bending, I have an experiment that you can do in your own home.



Take a self cleaning oven. Put two cast iron frying pans on a rack and run the self cleaning cycle. You will get a clean oven, a pair of clean frying pans (great for re-seasoning) and a bent oven rack. The weight of the pans on the rack is enough to stress the rack to bend it under the heat of the oven.



It is very easy to use what seems to be similar looking situations for comparison. But you have to look at the details to make an honest comparison.



Remember that the towers were struck with much higher damage than just a fire. Look at the blue prints for the construction of the towers and show me which building you reference even comes close to this design.



Look at the difference between the two sides of the building in the Oklahoma city bombing. You can see all the central support columns that helped keep much of the building standing. A high explosive was used and because of all the support columns, much of the building was left standing.



http://en.wikipedia.org/wiki/Oklahoma_City_bombing

These are two different designed structures and thus the failures modes are different.



With the WTC, the central support design left a single point of failure. Added with the failing support due to softening steel, tones of concrete and steel mass above the failing structure, soon it has to give out.



To show the difference, take an ice cube and some popsicle sticks to make a construction like the WTC's. Put the ice cube in the middle and put weight on the sticks. See if the structure survives after the ice cube melts. Not the exact same but it ties into the full design. Now repeat the experiment with extra support columns for the popsicle sticks. Different failure modes.



Also, take two pieces of concrete about the same size and mass. Put them on a piece of steel. Hit both with as much force as possible. One with a normal hammer and the other with a 10Kg sledge hammer. See how much more damage is done to both.



I still have to check the references of the paper in regards to the talk of thermite.



I will be passing this paper onto a couple of engineering and chemistry friends of mine to read. I know they have an interest in the WTC terrorist attacks.



I could repeat much of what is said here.

http://www.civil.usyd.edu.au/wtc.shtml

I will look through the papers references and comment on those later this weekend.

Reply

11 Robin April 9, 2009 at 3:25 pm
How many of these buildings had been impacted by a jet plane?

How many of them were built with the wide open design of the WTC towers? Now secondary support columns for the individual floors.

I did look at these sites over the years and I cannot find a single building that was subjected to the same stresses and forces as well as structural damage as the WTC’s were.

Seeing the video of the pieces of planes shooting through the other side of the buildings is enough for me to believe that there was some severe damage inside.

For those that don’t believe in the effect of heat and steel bending, I have an experiment that you can do in your own home.

Take a self cleaning oven. Put two cast iron frying pans on a rack and run the self cleaning cycle. You will get a clean oven, a pair of clean frying pans (great for re-seasoning) and a bent oven rack. The weight of the pans on the rack is enough to stress the rack to bend it under the heat of the oven.

It is very easy to use what seems to be similar looking situations for comparison. But you have to look at the details to make an honest comparison.

Remember that the towers were struck with much higher damage than just a fire. Look at the blue prints for the construction of the towers and show me which building you reference even comes close to this design.

Look at the difference between the two sides of the building in the Oklahoma city bombing. You can see all the central support columns that helped keep much of the building standing. A high explosive was used and because of all the support columns, much of the building was left standing.

http://en.wikipedia.org/wiki/Oklahoma_City_bombing

These are two different designed structures and thus the failures modes are different.

With the WTC, the central support design left a single point of failure. Added with the failing support due to softening steel, tones of concrete and steel mass above the failing structure, soon it has to give out.

To show the difference, take an ice cube and some popsicle sticks to make a construction like the WTC’s. Put the ice cube in the middle and put weight on the sticks. See if the structure survives after the ice cube melts. Not the exact same but it ties into the full design. Now repeat the experiment with extra support columns for the popsicle sticks. Different failure modes.

Also, take two pieces of concrete about the same size and mass. Put them on a piece of steel. Hit both with as much force as possible. One with a normal hammer and the other with a 10Kg sledge hammer. See how much more damage is done to both.

I still have to check the references of the paper in regards to the talk of thermite.

I will be passing this paper onto a couple of engineering and chemistry friends of mine to read. I know they have an interest in the WTC terrorist attacks.

I could repeat much of what is said here.
http://www.civil.usyd.edu.au/wtc.shtml

I will look through the papers references and comment on those later this weekend.

Reply

12 Robin April 9, 2009 at 3:25 pm
How many of these buildings had been impacted by a jet plane?

How many of them were built with the wide open design of the WTC towers? Now secondary support columns for the individual floors.

I did look at these sites over the years and I cannot find a single building that was subjected to the same stresses and forces as well as structural damage as the WTC’s were.

Seeing the video of the pieces of planes shooting through the other side of the buildings is enough for me to believe that there was some severe damage inside.

For those that don’t believe in the effect of heat and steel bending, I have an experiment that you can do in your own home.

Take a self cleaning oven. Put two cast iron frying pans on a rack and run the self cleaning cycle. You will get a clean oven, a pair of clean frying pans (great for re-seasoning) and a bent oven rack. The weight of the pans on the rack is enough to stress the rack to bend it under the heat of the oven.

It is very easy to use what seems to be similar looking situations for comparison. But you have to look at the details to make an honest comparison.

Remember that the towers were struck with much higher damage than just a fire. Look at the blue prints for the construction of the towers and show me which building you reference even comes close to this design.

Look at the difference between the two sides of the building in the Oklahoma city bombing. You can see all the central support columns that helped keep much of the building standing. A high explosive was used and because of all the support columns, much of the building was left standing.

http://en.wikipedia.org/wiki/Oklahoma_City_bombing

These are two different designed structures and thus the failures modes are different.

With the WTC, the central support design left a single point of failure. Added with the failing support due to softening steel, tones of concrete and steel mass above the failing structure, soon it has to give out.

To show the difference, take an ice cube and some popsicle sticks to make a construction like the WTC’s. Put the ice cube in the middle and put weight on the sticks. See if the structure survives after the ice cube melts. Not the exact same but it ties into the full design. Now repeat the experiment with extra support columns for the popsicle sticks. Different failure modes.

Also, take two pieces of concrete about the same size and mass. Put them on a piece of steel. Hit both with as much force as possible. One with a normal hammer and the other with a 10Kg sledge hammer. See how much more damage is done to both.

I still have to check the references of the paper in regards to the talk of thermite.

I will be passing this paper onto a couple of engineering and chemistry friends of mine to read. I know they have an interest in the WTC terrorist attacks.

I could repeat much of what is said here.
http://www.civil.usyd.edu.au/wtc.shtml

I will look through the papers references and comment on those later this weekend.

Reply



6 Arthur Scheuerman April 9, 2009 at 4:52 pm
The Myth of Controlled Demolition of the WTC Buildings
1
Ferris oxide (rust), aluminum, carbon, iron, silicon(sand) are exotic high teck explosives? The “truthers” just through any new idea into the air and charge it with emotion and call it science. It is amazing to me how many Architects and Engineers cannot understand how the Towers could collapse from fire. Architect Richard Gage says he has 500 to 600 Engineers and Architects who believe the Towers and Building 7 were demolished by explosives. WTC 7, a high-rise office building was not hit by any planes and was destroyed by a fire in ordinary combustible furnishings. You may say it’s highly unreasonable to believe that 4 steel constructed high-rise buildings collapsed from fire in one day? Well they all had one thing in common; Long Span steel composite floors with connections not designed for thermal effects. They designed these buildings to maximize office space while maintaining exterior views and providing office layout flexibility and the interior columns were interfering and had to be removed. This column removal was attained by using long span steel beams and girders which are used in many existing office high-rise buildings. The use of lightweight, long floor spans along with the 1968 building code relaxation lowering the fireproofing requirements have apparently created a condition that with large fires in these buildings could lead to a major collapse. Long span steel beams have a magnified response to heat. They expand a longer distance than short span beams and they still have their full strength in the beginning of the expansion. NIST computer studies show that this strength while the beam is elongating can shear off the bolts connecting the beams to the columns or girders if the connections are not designed to counter this effect. This strength as the beam expands can also crack the concrete slab at the shear studs and buckle the beam itself as differential internal compression builds up in the steel during expansion. A buckled or bowing long span (over 40 feet) beam can impart large tension forces on the connections especially when a sagging beam begins to shrink as it cools. Bowing occurs when the bottom flange of a steel beam expands faster than the top flange. Bar joist floor bowing places immediate pull-in tension on the connections.

The performance of the floor/beam systems in such buildings has been attributed to a complex interrelated sequence of events, described rather simply as follows (Buchanan 2001):

1. The fire causes heating of the beams and the underside of the slab.
2. The slab and beam deform downwards as a result of thermal bowing.
3. Thermal expansion causes compressive axial restraint forces to develop in the beams.
4. The reaction from the stiff surrounding structure causes the axial restraint
forces to become large.
5. The yield strength and modulus of elasticity of the steel reduce steadily.
6. The downward deflections increase rapidly due to the combined effects of the
applied loads, thermal bowing, and the high axial compressive forces.
7. The axial restraint forces reduce due to the increased deflections and the
reduced modulus of elasticity, limiting the horizontal forces on the
surrounding structure.
8. Higher temperatures lead to a further reduction of flexural and axial strength
and stiffness. (NISTIR 7563)
9. The slab–beam system deforms into a catenary, resisting the applied loads
with tensile membrane forces.
10. As the fire decays, the structural members cool down and attempt to shorten in length.
11. High tensile axial forces [pull-in] are induced in the slab, the beam, and the beam connections.
These actions can take place in two or three dimensions

Photo of Steel structure after Cardington tests in the UK

Use of Steel in Construction

Steel has always had a stability problem under fire conditions. Steel members begin to expand immediately when heated and internal thermal stress in the beams, girders, or joists bends, buckles, twists, and warps the steel, eroding structural integrity. Thermal expansion in a long span beam can shear off the bolts connecting the beam. Thermal contraction in a sagging, long span steel beam can tear out the connections as the beam cools. From a collapse potential the long span, bar joist trusses used in the Tower construction was a most vulnerable design. It was evident from the bowing inward of the exterior columns that the sagging trusses pulled-in these columns on the long span side of each building beginning the progressive collapses. There is also evidence that the collapse timing corresponded with the time to heat these steel trusses,- depending on the insulation thickness used in each tower,- to a temperature which expanded the steel enough to collapse the trusses or cause thermal bowing where the lower truss chord expands allowing the top chord to go into suspension, or upon cooling of the sagging contracting trusses pulled in the exterior column walls .

UK engineer Dr. A.S. Usmani, et al., related the following relative to his preliminary findings about the collapse of the WTC Towers: 5

Due to their length and slenderness, the thermal expansion effects in long-span, steel bar joists produce compression buckling in floors at lower temperatures than are presently compensated for in the fireproofing codes. This sort of thing has not been considered in the design of high-rise structures, with the possibility of multiple-floor fires.

Longer-span steel structural members expand a greater distance than short-span elements, and, as they are heated, slender elements can fail from buckling under compression at temperatures that are still low enough (400° to 500°C) that the steel retains most of its strength.

According to S. Lamont et al “The furnace test does not consider vial structural phenomena found in the 3D behavior of real buildings including large deflections, restrained thermal expansion and thermal bowing, membrane and catenary load carrying mechanisms in slabs and beams respectively, and compatibility of deflections in two or more directions in an integrated structural frame,”41

Expansion Effects

The wider floor sections of the Towers had longer 60 foot joists, which, because of increased loads, would be inherently weaker and would expand and lengthen a greater distance if exposed to heat. Note: “Steel will expand .06 percent to .07 percent in length for each 100°F rise in temperature. Heated to 1,000°F, a steel member will expand 9½ inches in 100 feet of length.” 21 According to the FEMA, ASCE- Building Performance Study, “an unrestrained, 20-meter-long [about 60-foot] steel member that experiences a temperature increase of 500°C [1,022°F] will expand approximately 110 mm [4.0 inches].”18 Note: Steel expansion begins immediately as the steel is heated and can be destructive to the long span trusses even though the steel temperature is low enough (300 to 500 C) that the steel retains most of its strength.

“Differential expansion of steel is probably the main cause of failure of the floor system used in the towers. Since the top chord of the long-span truss is steel, it will elongate more than the top concrete slab at the same temperature. Steel, if not adequately insulated, will also absorb heat faster than concrete. Steel differential expansion has been shown to be a cause of bowing, shear-induced buckling of the struts and the loss of composite action in the floor system [as a result of] the shear ‘knuckles’ detaching from the concrete. The knuckle bonds sequentially break, starting at the ends, eliminating the composite action under load. “(NIST, 2, Appendix K):

Current practice is to protect the steel by requiring enough insulation to prevent loss of strength by preventing columns from reaching 1000 deg. F (538o C) and beams from reaching 1100 deg. F (593o C) in the standard furnace test. This criterion has proven effective in short span designs. As the steel is heated further and temperatures rise to higher than 600°F, steel loses strength. At 1,200°F (about 650°C), steel loses about 50 percent of its strength. At 1,300°F (about 700°C), the yield point is drastically reduced and steel members fail. The collapse of Building 7 and the Twin Towers has been proven that this protection requirement (i.e. 10000 F. for columns and 11000 F for beams) inadequate when protecting long span steel floors since the expansion effects in steel beams can buckle the beams or fail the connections at lower temperatures (400 to 5000 C). Long span steel must now be protected from heat by adequate fireproofing insulation and integrated properly to compensate for the lower temperature effects of thermal expansion and contraction during fires. To maintain building stability, lateral bracing becomes even more important in construction that features lightweight, long-span floors. All three buildings relied on floor membrane stability to laterally support the columns.

The fireproofing insulation thickness schedules in the Building Code were developed for the short span floors which were used in the older high-rise buildings and this insulation defended against thermal weakness in the steel beams rather than expansion which apparently was not a problem in the shorter spans. Steel weakening occurs later at higher temperatures 1100deg. F (about 600 deg. C). Low temperature expansion effects occur earlier as the steel is first heated to temperatures below 400 deg. C and long span, expansion effects have yet to be compensated for in the fireproofing insulation codes. This deficiency in high-rise office buildings using large open areas, and long span composite flooring systems is a new finding uncovered by the study of the collapse of the Twin Towers and Buildings 5 and 7 and was first illuminated in the engineering computer studies. Further scientific research is critically needed to determine what changes are needed in fireproofing insulation types and schedules for the longer spans and the possibly of requiring span limitations, redundancies in column strength, connections designed to compensate for the expansion and separate lateral column support.

A key characteristic of large open office areas not compartmented by firewalls is that a fire can release a large quantity of heat as the fire spreads over the floor if not extinguished immediately as by a working, water spray system (sprinkler) or by the Fire Department. The water spray systems in both towers and Building 7 were damaged by the forces of plane impacts and in Building 7 by the tower’s collapse impacts damaging the water mains in the streets which also deprived the Fire Department of water. Fire size is another major factor affecting steel failure. FDNY Chief Vincent Dunn explains:

“A large-area fire in which flames involve much of the steel beam in a short period of time will heat a beam to its critical temperature more quickly. A so-called ‘flash fire’—which suddenly involves a large area with flame, can heat [inadequately fireproofed] steel to its failure temperature rapidly.”4

Because long span, lightweight steel, bar-joist floor construction was used to provide wide-open spaces free of columns within the WTC towers, vulnerabilities were introduced. Since lightweight steel trusses are affected by a large fire faster than heavy members, and since they span such larger areas, their failure would be much more serious than would the failure of a short-span element.

The other thing about long span floors is that when an interior column or columns fail under such large area circumstances the building may not be able to redistribute the floor loads to other columns and the collapse is likely to progress upwards putting all the floors above into suspension. If the building is not protected against progressive collapse, global (total) collapse can ensue. Building 7 collapsed because one key interior column failed after the long span floors failed around it. Because of the long spans the key column was supporting a large area of flooring on every floor. It was discovered by the NIST computer studies that failure of this one column would have brought the entire building down without any fire. Such a lack of column redundancy should be corrected by deigning the building to withstand the removal any single column.

Reports of Controlled Demolition, Molten Steel, Thermite, etc.

Scientists rarely speak of the ‘truth’ until they have spent enough time examining the evidence. Its amazing to me how the Architects and Engineers for 9/11 Truth who apparently have little or no knowledge or expertise in fire protection or building collapse, just dismiss the reports of the top Fire Protection engineering experts in their fields and take some theological professor’s absurd babble as gospel. I suppose if their car’s engine broke down they would call the local preacher. The vaguest possibility is immediately touted as the truth and repeatedly echoed on the internet without any research or fact checking. Four years after the 9/11 attack and without inspecting any of the steel the Architect Richard Gage was listening to some equally uninformed Philosophy Professor, David Ray Griffin and had an epiphany and from then on he ‘knew’ that the buildings “had to be brought down by explosives”. “That’s the only way that you could have all the exterior columns in Building 7 fail within a fraction of a second.” How does he know all the columns failed at the same moment? These lower columns were out of sight of the cameras. The first thing to fail was the floors on the east side then the east interior columns as evidenced by the east penthouse on the roof caving in. Five seconds later the west penthouse caved in indicating widespread core column failure and than the exterior frame started to descend, but the outside frame was strong and there were large belt trusses around the entire building between the 22nd to 24th floors. These belt trusses held the upper building steady until a large number of lower exterior columns had failed. With the failure of most of the interior floors and columns there apparently was an 8 floor section of exterior columns without lateral support. When this 8 story section of columns buckled the building began a 2 second period of free fall acceleration. Building 7 took over 13 seconds to collapse not 6.

NIST computer models show that the building was deconstructed by the heat of the uncontrolled fires expanding the long span steel floors, buckling the beams, disconnecting structural steel, and eventually buckling one key column which started the progressive collapse. The design was so flawed that that because that one column buckled the collapse progressed up to the roof and than across the core to take down the entire interior of the building. I want to hear what the Architects & Engineers for 9/11 truth think about a building within which the failure of one column will start a progressive collapse that brings down the whole building. Now that’s an architectural and engineering problem that needs their attention which will not be forthcoming if they continue to believe the buildings were taken down by supposed explosives. The Architects and Engineers for 9/11 truth’s Richard Gage is going all around the country spreading his pseudoscientific misinformation that explosives were used to bring down these buildings.

The top experts in the field, Shyam Sunder the NIST lead investigator, Gene Corley the American Society of Civil Engineers lead investigator both of whom have years and years of engineering experience believe the buildings were brought down by the fires. Gene Corley who was also the lead investigator in the Oklahoma City disaster, – which was destroyed by explosives, – said there was “no evidence of explosives” at the WTC site. He and Johanthan Barnett another experienced Fire Protection Engineer were on the scene immediately and examining the steel. Dr. Barnett described the devastation caused by the interior collapse of several floors in Building 5 (Yes. Building 5.) from fire when the steel beams pulled out from their connections. These are all recognized experts in their fields and have to get things right in order to maintain their positions. I doubt a person inexperienced in the fire protection field could prove them wrong on anything related to the towers collapse without years of study, but they keep trying. The BBC put on the top building demolition expert Mark Loizeaux who explains how the towers collapse could not have been a controlled demolition and all he gets is blasted by the 9/11 ‘truthers’ for being ‘in-on’ the conspiracy.

Their spokesperson Kevin Ryan knew very little about how floor assemblies are tested by his own company Underwriters Laboratory. He worked in the water testing section of the UL. Mr. Ryan reported that they tested the steel and it withstood 2000 deg for 3 and 4 hours. The UL tests 17 foot floor and wall assemblies not the steel per se. The problem is that the long span composite floors used in the towers were never tested by anyone in their long span configuration of 60 feet. Building 7 also used long span steel “I” beams. What most architects apparently don’t yet know is that lightweight, long span steel trusses and “I” beams can fail at fire temperatures not yet compensated for in the codes. The standard furnace test can only handle 17 foot lengths of flooring and doesn’t test the connections for fire exposure. The furnace standards were set in the 1930s, 40s, and 50s when about 15 to 20 feet was the standard span used in high rises built for the more conservative codes at that time. These older buildings used shorter spans, more robust columns and beams, stronger connections and better fireproofing then now and stood up to fires quite well. If a floor failed the push-out forces of expansion and the pull-in (catenary) forces created by the short spans were easily handled by the strength of the rest of the structure. For this reason the codes allowed floors to have a shorter (3 hour) rating than the columns and girders (4 hours). The 17 foot furnace test, currently still used, is meaningless for the longer spans and connections. The main problem in the Tower flooring was due to the differential elongation (expansion) of the steel parts of the trusses.

NIST’s studies found that the different expansion rates immediately deformed the steel parts, buckled the top chords and struts in the bar joist floors and disconnected the composite bond between the concrete slab and the steel joists. Greater thermal expansion of the bottom chords releases the tension and allows the cool top chord to sag and bow downwards until it acts as a cable in suspension creating pull-in forces on the columns. Buckling of the top chord allows the bottom chord to act as a catenary. The contraction of sagging, long span steel flooring during the cool down faze after the fire dies down puts heavy pull-in loads on the connections. It is now known that Building 7 collapsed from expansion and/or contraction in the floor beams disconnecting enough of the beams and girders to affect column stability. There was a second or two when the perimeter wall came down at free fall acceleration but this in no way indicates demolition was involved. There was so much destruction of the interior structure over many floors that long sections of exterior columns failed at essentially the same time.

Many people interpreted the loud sounds and debris being projected out sideways during the Tower collapses as an indication that explosives were used. Most of these loud sounds, heard during the collapses were heard after the collapses began. In order for an explosion to cause a collapse it would have to occur before the collapse. Some ‘thunder’ sounds were heard in Building 7 before the exterior columns buckled and these were probably from floors collapsing and impacting the floors below. Explosive forces great enough to destroy the columns would be as loud as ten times the decibel level (140 db) of standing next to the speakers at a rock concert. NIST reports such loud sounds were not heard nor recorded in the video tapes.

The undamaged exterior walls can be seen bending and buckling inward in the videos of both WTC Towers long before any sounds or ground vibrations occurred. In Tower 2, the exterior columns in the east wall were photographed bowing inward up to 10 inches, 18 minutes after the plane’s impact. That’s 38 minutes before the global collapse began. To be technical, you could say that Tower 2′s collapse began slowly, with possibly some noise or impact sounds from falling floors, about 38 minutes earlier than the official collapse time.

Sequence of buckling of Tower 2’s East wall columns.

The explosive sounds and expanding dust clouds occurred just after the east wall buckled inward and started the collapse, and not before the buckling, as would have had to have happened with controlled demolition.

When the undamaged south exterior wall of Tower 1 was photographed it was bowing inward up to 55 inches on floors 95 to 101, about six minutes before these columns were seen buckling inward. This bowing and buckling was witnessed and video taped by the Police Aviation Unit.

In the North Tower “thunder” sounds were heard when some floors apparently collapsed on the south side 12 to 14 seconds before the top of the building was seen to tilt southward and begin falling as a unit starting the global collapse. Since each section of floor on the long-span side weighed about 500 tons, I would take these ‘supposed explosive’ sounds in Tower 1 as evidence of a floor or floors detaching and impacting the floors below on the south side which most probably accelerated south column wall failure. The boom, boom, boom, boom, boom repetitive sounds reported by firefighters as Tower 2 was coming down were most likely caused by the sequential collision of impacting floors after the top of the building began falling. The great quantity of air on each floor being compressed in a fraction of a second by great weight and momentum would propel air, smoke, and any concrete dust and debris outward from the building at great velocity by the bellows effect of the floors coming together so quickly.

Initial Collapse Cause

Much consternation has been expressed because of the fact that NIST only analyzed the events up to the point where the Towers were poised to collapse before runaway collapse began and failed to pursue the remaining collapse. This was largely because once the collapse began the chaotic impacts of the floors, walls and columns colliding could not possibly be analyzed accurately with even the strongest computers. As it was, it was a severe strain on computer capabilities to analyze the mechanism of collapse up to the point of runaway disintegration. By dint of computers running for extended periods of time NIST did analyze almost the complete collapse sequence of building 7.

Bar joist Floors

It is clear from the computer studies that the heat from the fires caused differential expansion of the steel parts in the long span, floor trusses in the towers with the resulting thermal bowing in some floors directly exerting pull-in forces on the exterior columns or this thermal bowing could have detached a floor at the weak, single bolt connections which would have impacted the floor below destroying its composite action by separating the concrete slab from the trusses and inducing strong tensile (suspension) forces in the double weighted floor. In other floors thermal expansion of the floor against the columns compressed the trusses which along with shear forces within the trusses buckled the diagonal compression struts collapsing the trusses themselves which went into suspension (catenary action) and this also assisted pull-in and eventually buckled in the exterior column walls. Differential thermal expansion of the concrete slab and the steel has also been shown by NIST to disconnect the knuckles (knuckles are the steel tops of the bent over bars in the trusses which are imbedded in the concrete) from the concrete slab causing loss of composite behavior in the floors.

All these adverse floor effects were caused by steel expansion which begins immediately as the steel is heated. Bowing and buckling can happen at low temperatures (300 C to 500 C) even before the steel beams would have been weakened excessively from higher temperatures. The longer the beam the further it can expand and since the steel still has its full strength the expansion can break the bolts holding the beam and bow or buckle the beam itself. Thermal contraction caused by cooling of sagging trusses or ‘I’ beams after the fire ‘burns out’ or dies down can cause strong pull-in forces on the exterior columns and core columns due to the contraction of the sagging steel trusses or ‘I’ beams.

Columns

In order for a column to support the loads it has to be plumb and in line with the columns above and below. The fact is, columns have to be axially (in line and centered) aligned to support the weight of the building above. If they get out of alignment by 10 to 20 degrees they buckle and can no longer support the weight. The Tower buildings collapsed because the floors first caved in from restrained thermal expansion and from thermal bowing or delamination of the slab and bar joists composite action affecting floor truss stability. The sagging, 60 foot long, floor trusses gradually pulled-in the 59 columns in one exterior wall in each tower and these column walls eventually buckled removing practically all support on one entire long span side. In Building 7 floor failures from steel expansion and/or contraction disconnecting the floor beams exposed a critical column to loss of lateral restraint over many floors and lateral forces causing the column to buckle and remove support for all the floors above and starting the complete progressive collapse of the building.

In the WTC Towers once the exterior columns buckling spread, along an entire wall removing support on one face, the buckling spread around the towers exterior and into the core and the towers began to tilt. With the entire top of the building tilting all the columns were out of alignment and buckling and the leaning top sections of the tower began to fall straight down. Although the North tower antenna appeared from some northern angles to have began falling straight down it actually first tilted to the south because the south wall buckled first and the cantilevered top building section pulled the core along with the entire top over to the south. This is especially telling as evidence of fire induced collapse since all the damage from the plane impact was on the north side which side should have collapsed first,- if the plane damage was contributory,- and the tower should have leaned over to the north. The South Towers’ top tilted to the east because its east exterior wall buckled first from the pull-in forces of the failing long span flooring trusses on that side. Once the tower’s tops began tilting all the columns across the buildings would be out of alignment and easily buckled.

There have been some engineering analyses about the impacting floors slowing down the collapse so that the time to collapse should have been much longer than ‘free fall’ times of an object dropped from the towers tops. Once the buildings started to tip over from loss of column support on one side, the tremendous excess eccentric weight began buckling all the columns across the building. Once the tilted tower’s tops began descending the columns hit the floors or the lower columns at eccentric angles which easily detached the floors and buckled the columns. In order for the lower building section to offer any meaningful resistance to the falling building top, the columns would have had to hit each other exactly in line and plumb and this was impossible with the top of the building leaning causing eccentric angles of impact.

Once the Towers top building sections began tilting the columns on the side that originally buckled did not line up at all. These columns would have been hitting the floors and would have easily detached or buckled them. After the east wall buckled in Tower 2, the adjacent perimeter wall columns buckled from overloads and the columns on the opposite, west side of the building acted as a hinge would still be bearing on each other but at an eccentric angle which means they also would have also eventually buckled as the top tilted. These columns along with some of the core columns as they buckled are probably what kicked the bottom of the top building section to the west as reported by NIST. Because of the weight of the accumulating collapsing floors, there was a release of incredible potential energy changing to kinetic energy and building momentum as the accumulating chaotic mass of debris accelerated into the cellars.
The heavy core columns depended on the floors for lateral support once they lost lateral support and experienced ‘pull in’ forces and got out of plumb, there would have been little resistance to their buckling at the weak splices. After the upper part of the buildings began descending, with the incredible weight of the top of the buildings’ gaining momentum, like a heavy wedge or sledge all it had to do was break the welded, and single bolt connections holding the floors to the columns.

This is coupled with the fact that the falling top section’s momentum increases as the square of the number of floors impacted as the floors were detached and added to the weight of the descending top. There would have been little resistance to slow the top section’s increasing mass of impacted floors acceleration to the ground. Because this acceleration due to gravity increased the speed and momentum of the collapsing floors and building top, the impacts were increasingly violent as shown on the seismic graphs; increasing in amplitude until maximum when the mass of accumulating impacted floors hit bedrock seven stories into the cellar.

Since the Tower’s outer wall columns, especially in Tower 1, pealed out like a banana after the building top began to impact and disconnect the floors, these wall columns may have been able to break the connections to the floors ahead of the floors being impacted? In other words, with the weight of the wall columns pealing outward from the vertical along with the added horizontal forces of impacting floors projecting smoke and debris outwards onto these columns, these columns, while leaning out, might have been able to break the wall-to-floor connections ahead of the level of impacting floors or with the excess strain the connections could have failed sooner. If this is possible than I believe that the connection failures could have traveled down the sides of the buildings and accelerated faster than free fall. This might explain the rapidity of the collapses especially in Tower 1. The wall-to-floor connection failures could have traveled down the building sides and in effect started the floors falling before they were impacted by the accumulating mass of impacted floors above. Anyway this mechanism would have surly reduced the failure times of the floor connections.

But these buildings did not collapse faster than free fall times and this is proved by the photos themselves. It can be seen that the detached exterior walls which were falling at free fall acceleration after they detached, were falling faster than the remaining center portions of the buildings. This fact proves the Towers fell slower than free fall acceleration.

The heavy exterior wall columns in the 1500 foot high buildings while pealing off could project the column sections outwards a great distance. This distance (300 to 400 feet) was proposed as only being made possible by explosive forces. I disagree. If a wall is strong enough and doesn’t break up as it falls outward it can fall out flat to a distance equal to its height. The Tower walls, however, did break at the weak column splices as they fell.

The compression of the 12 foot chunk of air on each floor down to a fraction of an inch in a fraction of a second as the floors came together would propel the air smoke and dust outward from the building at great velocity. The lightweight aluminum cladding as it broke free from the buckling columns also would have been propelled outward a great distance by this expanding cloud of air, smoke and dust. This gas compression would account for huge dust clouds and pieces of aluminum seen projected outwards from the upper sections of the collapsing buildings.

The light reflected off the aluminum pieces at the north wall of Tower 2 were interpreted as flashes from explosive ‘squibs’. These pieces of aluminum broke off from buckling columns. The flashes below the buckling east wall may have been from the aluminum cladding breaking free from the lower columns as they expanded after being unloaded of axial compressive weight by the buckling of the wall above and their expansion breaking the connections to the cladding. Also explosives leave characteristic tears and fractures in steel and especially in aluminum, and such indications were not found anywhere in the debris pile.

The compression of air in the elevator and air-conditioning shafts by the collapsing upper building section and floors, would project air, smoke, and dust down these shafts and out any path of least resistance on any floor or any of the HVAC air intake or discharge openings on the lower mechanical equipment floors in the exterior walls. This accounts for the plumes of smoke seen projecting outwards sideways from the buildings well below the collapsing floors. There were quite extensive Heating, Ventilating, and Air Conditioning (HVAC) shafts built into the building. These vertical shafts are connected to air conditioning exhaust and intake ducts open to the exterior on the mechanical floors.

Deep Seated Pockets of Fire

After any fire in which a building collapses, there often remain pockets of fire deep within the rubble pile. These ‘deep seated pockets of fire’ sometimes cannot be reached by water streams because of their being covered by debris. Air is sometimes drawn up from the bottom of the pile and feeds these inaccessible fires with air because these natural convection currents. Heated air rises because of its expansion and resultant buoyancy and is replaced by cool air drawn in from the bottom and sides of the fire. This air flow can become rapid because of the high temperatures developed. The more air drawn in the hotter the fire becomes and the increased temperature increases the convection currents which draw in more air. After a collapse there is more combustible material available to feed the fire. Like in a furnace the containment of heat by insulation provided by the compacted combustible material surrounding the fire allows the gradual increase of temperature. I am convinced that temperatures of over 2000 deg F. can easily be developed in these deep seated pockets of fire in the rubble of a collapsed building. This temperature is still incapable of melting steel unless there is excess oxygen available.

These fires can last for days and the heat can become intense and can heat any steel in proximity to the fire until the steel is glowing red, orange or yellow hot. These pockets of fire are common at burning building collapses and in no way evidence that that explosives or thermite were used to demolish the buildings. These underground fires are similar to blacksmith forge fires where air is blown into the charcoals by a bellows to raise the temperature of the fire to heat a piece of steel or iron. The blacksmith can tell how hot the steel or iron is by its color and can tell when the steel is soft enough to work it with a hammer.

I talked to a blacksmith at Old Bethpage Restoration on Long Island and he told me that he can create enough heat to burn and melt the steel and it sometimes happens when he is talking to people and absent mindedly keeps pulling the bellows chord and feeding air into the coals. Burning the iron melts the steel and ruins the work.

“With bellows blowing additional air through the fire, it can reach temperatures of about 3,000° Fahrenheit. Iron burns at 2,800°, however, so the smith has to be careful to not ruin his work! … The smith’s fire contains too much oxygen to allow iron to melt; as it approaches its melting point the iron burns instead.”
http://www.osv.org/cgi-bin/CreatePDF.php?/tour/index.php?L=12&PDF=Y

Pure oxygen is used in oxyacetylene torches to actually ignite burn and melt the steel when cutting. These torches were used to help clear the debris pile during search and recovery operations. A slag of melted and re-solidified steel and Ferrous oxide is formed on the opposite side of the cut. This slag formation and the angle of these cuts were erroneously reported to be evidence of cutter (demolition) charges having been used to sever the columns. Small molten pieces of glowing steel cool into spheres as they fly out from the cut. These steel microspheres,- said to be evidence of thermite,- would also have been produced during the buildings’ construction by welders and retained in the concrete or else where only to be released during the collapse.

The deep seated pockets of fire often have to be dug out by hand tools, back hoes or grapplers in order to expose the burning material for extinguishment. It is common to hold off hitting the fire with water until it is fully exposed in order to prevent the great amount of steam that would be created from obscuring the work area until the fire is fully exposed and can be quickly extinguished. This is what is happening in the picture of a grappler pulling out a piece of glowing hot steel from the debris pile so often described as ‘molten’ steel.

About the “meteorite” recovered from ground zero. Everyone uses the word ‘molten’ in describing the steel in the meteorite when it actually is deformed pieces of the bar joist flooring compacted with concrete and pieces of furnishings. This is careless language. Apparently people seeing steel deformed by heat immediately call it molten or melted steel. Melted or molten steel indicates a liquid state which only occurs at higher temperatures than an ordinary fire can produce. The meteorite is a piece of pancaked concrete and steel floors fused together by high impacts. It contains charred pieces of books and paper which would not be present if heat high enough to melt steel existed at anytime in the “meteorite”.

Much has been made of the presence of molten metal in the debris pile after the collapse. Presumably this molten metal was somehow thought to be connected to explosions or thermite charges, but there were Uninterrupted Power Supply (UPS) battery rooms on some floors of the Towers and Building 7. These battery rooms supplied continuous battery power to computers if the electricity failed for any reason. These batteries contained tons of lead which melts at low temperatures [327 C (621 F)]. The heat from the fires in the debris pile could easily have melted this lead and the aluminum from the plane and aluminum from the tower’s own cladding which were probably the metals that were seen flowing through the pile. NIST reported UPS in the 13th floor of Building 7 and the 81st floor of Tower 2. There were also quantities of lead, tin, silver and even gold used in the computer circuit boards. In the some people’s imagination the reported ‘flowing molten metal’ became ‘rivers of molten steel’.

Additionally the EPA reported over 400 different chemicals in the dust and debris. These chemicals could easily be assembled conceptually to propose any type of chemical reaction imaginable including thermite reactions. In addition thermite reactions are rapid they are over in a matter of seconds and wouldn’t last the hours or days at which times the molten metal was observed. As far as I know thermite has never been used to demolish buildings and the expertise probably doesn’t exist. Thermite is hard to control and can’t be held against the columns because it would burn, spall or melt down through any material used to support it against the columns long enough to do enough damage to cause the column to buckle.

About the concrete pulverization into dust reported to be only possible by explosive charges; F.R. Greening did a paper called Energy Transfer in the WTC Collapse in which he says “the energy required to crush concrete to 100 μm particles is 1.9 × 1011 J, which is well within the crushing capacity of the available energy. Hence it is theoretically possible for the WTC collapse events to have crushed more than 90 % of the floor concrete to particles well within the observed particle size range.” http://nistreview.org/WTC-REPORT-GREENING.pdf. I would also investigate the possibility that the concrete was sub par to begin with due too much air or water having been added during the pouring and finishing operation to speed working and leveling the cement or to freezing during curing in the course of construction.

Do you think the architect or engineers who built the Towers would want to admit the deficiencies in design, fireproofing and other construction weaknesses after their buildings collapsed? Do you think they will get any other jobs after 4 of their buildings collapsed from fire? How come the 9/11, Architects & Engineers for truth never mention Building 5. Building 5 had a serious fire on many floors and had several floors collapse from the steel beams being disconnected from the columns due to thermal expansion, sagging and catinary action tearing out the bolted beam connections? (ASCE, Building Performance Study) I suppose that some of the ‘truthers’ never even read the American Society of Civil Engineer’s or the NIST’s report. Did building 5 also have charges set beforehand? How many other buildings had hypothetical charges set beforehand and were never set off? If they went to all the trouble to rig all these buildings with alleged explosives, why didn’t they just set them off and forget the planes and the fires. Waiting for the planes and fires would surely increase their chances of being detected.

There are so many questions answered by the fire theories and so many unanswerable questions posed by the demolition theories that it is ludicrous to continue the proposition that explosives had to be employed to collapse these buildings.

Do you know that the Port Authority of NY, NJ didn’t legally have to follow any building codes? The reason the columns broke at the splices was that they had serious weaknesses due to lack of reinforcing plates or even welds on most of the exterior column, bolted splices and not because of the ridiculous idea repeated incessantly by Richard Gauge that they were broken up into short pieces, presumably by explosives, ‘so they would fit onto the trucks to be carried away’. The long span truss floors were never tested for fire resistance at their design length. Why do you think it took so long to get the plans for the buildings after they collapsed while the building engineers had them all along? I am sad to think the architects and engineers for 9/11 truth would be accepting of such a convenient excuse,- that explosives or thermite was involved,- but that idea would allow them to avoid the introspection necessary to fully realize their own ignorance of what fire can do to steel beams and columns,- a necessary realization before meaningful knowledge can be developed to make their buildings safe.

About the eye witnesses hearing supposed explosions; there are many reasons that loud sounds can be produced at a fire. Most of the people in Tower 2 did not know Tower 1 had been struck by a plane but they heard the explosion and even felt the radiant heat produced by the fireball. Often at fires the ones closest to the fires and engaged in heavy work have a very limited overall conception of what is actually happening. When you don’t know what’s happening especially in the dark smoky conditions your imagination starts to work. Barry Jennings said he was stepping over dead bodies when being led out of building 7 after it was hit by pieces of Tower 1. He later admitted that he never actually saw these bodies. He must have imagined it. I suppose he also imagined seeing the two Towers still standing amid the smoke after he experienced a supposed explosion while descending the stairway. The “explosion” that Barry Jenning’s heard was probably the pieces of Tower 1 hitting Building 7. Even experienced reporters couldn’t believe the towers were gone from the skyline after they collapsed.

When Tower 2 collapsed most of the people in Tower 1 thought the sounds and vibrations came from the building they were in and they even felt a rush of air up the stairs as the air was compressed in the cellars. The fact that they are in strange circumstances with lack of information, smoke and possibly darkness, and the presence of strange sounds creates a fertile field for the imagination. There can also be real smoke explosions (backdrafts) particularly in fires that have a flammable liquid involved. One elevator shaft that extended into the cellars experienced a fuel-air explosion from the jet fuel spilling down and evaporating in the shaft. There were other fuel-air explosions in the elevator shafts. There could have been floor detachments impacting the floors below and producing loud sounds before any general collapse began. Explosives produce loud distinctive pressure waves that can leave people deaf or blow out eardrums and usually blow out all the windows on the particular floor and in any buildings nearby. This kind of sharp piercing crack was not heard. The windows broken out and marble wall panels detached on the interior of the first floor lobby were probably because of torque or bending forces experienced on the lower floor columns from the plane impacts many floors above. The buildings were reported to sway several feet when the planes hit the towers. In order to let additional light into the lobby these lower exterior columns were fewer and further apart than the columns above. The lower ‘core’ columns in this area were stronger and securely cross braced to compensate for this weakness of the exterior columns in the lobby. This fact was probably responsible for saving the lives of the members of a Ladder Company who were trapped in the stairwell on these lower floors during the collapse. It’s too bad this strength wasn’t continued up the core to the building top. It may have saved many more lives by protecting the stairways. The reports of “explosions” in the cellars were also probably from such column or floor displacements or from jet fuel ignitions in the elevator shafts. If you imbed a stick into the ground and hit it with another stick most of the deformation will be in the ground around the bottom of the stick. There were reports of split walls and ceiling collapses on many floors after the planes hit.

The “mysterious” collapse of Building 7.

How do you think that the alleged conspirators knew that Building 7 would be hit by pieces of Tower 1 which would set it on fire? They would have to know this beforehand in order to set the mysterious explosive charges that allegedly demolished the building. Why did they wait 5 hours while the fires burned before they set off these alleged charges, and how did these so called explosive charges or thermite withstand the fires for 5 hours without igniting and burning off? The NIST computer models show steel beams buckling, sagging floors and disconnection of the beams from the columns and finally failure of one key column which started the global collapse, all from the heat of the fires expanding the long span steel and breaking the bolted shear connections in Building 7.

BBC reporting error on Building 7 collapse.

You may ask “How did the BBC know that the Towers were going to collapse?” The BBC didn’t know. Did you ever hear a mistake made by a reporter? Or do you believe everything you are told by a TV reporter in the heat of an emergency? The BBC reporter on the air received an erroneous report that the Building 7 had collapsed before it actually did and reported it well before the actual occurrence. It was a simple mistake.

I can imagine how it happened. In addition to the damage done to Building 7 by the heavy steel column trees that pealed off of the collapsing towers some of these steel columns penetrated the roads and broke the nearby water mains. There was fire on many floors in Building 7 and without water these fires could not be controlled. The collapse possibility was anticipated by the Fire Dept. who ordered the evacuation out of the building and out of a “collapse zone” about 600 feet around the building. Apparently they were the only people who realized the possibility that an out of control fire on multiple floors in a steel framed, long span, open area, office building could cause a collapse. They had just experienced the collapse of two similar buildings trapping and killing many of their brothers. The ‘collapse zone’ was a large area including buildings and streets around Building 7 and clearing this large area of people was a big problem. To get some people reluctant to move swiftly out of the area I can imagine someone saying “the building’s coming down”. A reporter may have heard this and called his boss and told him the building 7 is coming down. The person receiving the call believed the building was already collapsing. It went out over the air as the building had already collapsed before the actual occurrence. The anticipation of collapse was a brilliant call by the Fire Dept. and no lives were lost when the 47 story building collapsed a few hours after the evacuation order was given.

This is a message from Chief of Department (ret.) Daniel Nigro the chief in charge of the fire, addressing the conspiracy theories surrounding the collapse of WTC 7.

Release date: September 23, 2007

Regarding WTC 7: The long-awaited US Government NIST (National Institute of Standards and Technology) report on the collapse of WTC 7 is due to be published at the end of this year (although it has been delayed already a few times [ adding fuel to the conspiracy theorists fires!]). That report should explain the cause and mechanics of the collapse in great detail. Early on the afternoon of September 11th 2001, following the collapse of WTC 1 & 2, I feared a collapse of WTC 7 (as did many on my staff).

The reasons are as follows:

1 – Although prior to that day high-rise structures had never collapsed, the collapse of WTC 1 & 2 showed that certain high-rise structures subjected to damage from impact and from fire will collapse.
2. The collapse of WTC 1 damaged portions of the lower floors of WTC 7.
3. WTC 7, we knew, was built on a small number of large columns providing an open Atrium on the lower levels.
4. Numerous fires on many floors of WTC 7 burned without sufficient water supply to attack them.

For these reasons I made the decision (without consulting the owner [Larry Silverstein], the mayor or anyone else – as ranking fire officer, that decision was my responsibility) to clear a collapse zone surrounding the building and to stop all activity within that zone. Approximately three hours after that order was given, WTC 7 collapsed.

Conspiracy theories abound and I believe firmly that all of them are without merit.

Regards, Dan Nigro
Chief of Department FDNY (retired)

On October 4 2001 Chief Nigro said; “The most important operational decision to be made that afternoon was the collapse [of Tower 1] had damaged 7 World Trade Center, which is about a 50 story building, at Vesey between West Broadway and Washington Street. It had a very heavy fire on many floors and I ordered the evacuation of an area sufficient around [building 7] to protect our members, so we had to give up some rescue operations which were going on at the time [under the ruble of Tower 1] and back the people away far enough so that if 7 World Trade Center did collapse, we wouldn’t lose any more people. We continued to operate on what we could from that distance and approximately an hour and a half after that order [to evacuate the building and collapse zone] was given, at 5;30 in the afternoon, 7 World Trade Center collapsed completely. I continued to operate at the scene until probably somewhere around 8 o’clock, at which time I borrowed Chief Meyer’s car, because mine was destroyed and went home to [take a], shower, change my clothes and I came back to work at approximately between 11 and midnight with Chief Turi.”
(New York Times interview Date; October 24, 2001 , transcribed by Elizabeth F. Nason)

If you really believe that all the top fire protection engineers from the American Society of Civil Engineers (ASCE) and government scientists from National Institute of Standards and Technology (NIST) investigating the collapse are in on a conspiracy and also want to accuse the BBC, the NYC Fire Department, the NYC Police Department, the Red Cross and all the Government agencies controlling access Building 7 of being ‘in on’ a secret controlled demolition even though there was no hard evidence than I would say you may be suffering from a case of paranoia. Paranoia can easily become contagious when people panic and no longer trust their government. We certainly had reason not to trust our previous government. I would say that if you really believe these preposterous demolition theories you should do some soul searching and possibly seek some therapeutic help.

In conclusion I think all the reports of controlled demolition can be explained by sounds or sights produced by the plane impacts and jet fuel and air explosions; the sounds of the Towers collapse. When the interior of building 7 collapsed it would have produced loud sounds well before the exterior walls began collapsing.

It’s an ill wind that blows no good and the good thing is that NIST now has an effective computer model to test whether a new or existing building is safe from collapse from fire. The architects and engineers should use this capability to assure any proposed or existing designs are safe. Another good thing is that any corrections proposed can be run through the computer and any tested for effectiveness. This NIST computer work,- which modeled the fires and every steel column and beam with their connections,- shows that Building 7 was deconstructed by the heat of the uncontrolled fires expanding the long span steel floors, buckling beams, disconnecting structural steel connections, collapsing the floors and eventually buckling one key column which started the progressive collapse. The connections and lateral support were so week that that the collapse of one key column progressed across the core to take down the entire interior of the building. Now that’s an architectural and engineering problem. I want to hear what the Architects & Engineers for 9/11 truth think about a building that can loose one column which starts a progressive collapse that brings down the whole building. Design problem? They should be eager to get those computer models working instead of raving about some imaginary explosives having brought down these buildings.

Arthur Scheuerman
Retired Battalion Chief, FDNY

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18 fuck face April 11, 2009 at 11:08 am
Ya'll niggas smart

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19 SteelMelts April 11, 2009 at 5:21 pm
Let me guess, Rosie sponsored the this fact finding mission?

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26 klistir April 12, 2009 at 2:34 pm
Arthur



you are a liar. Who paid you to write this "expose" of yours? Aren't you ashamed of what you are doing?



First of all, I tried your little oven trick and noticed NO bending whatsoever. Pure LIE.



Secondly, you are saying chemists and physicists can't recognize ordinary RUST and tell it apart from composite explosives? Are you kidding? And WHO are you kidding?



Thirdly, all those reports on explosions in the buildings, reports on molten steel found on all three sites, nearly free fall speed collapse of all three buildings, that's all bogus? Immediate disposal of structure steel from all three sites? And we all saw the pictures of some scarce fires in WTC 7. There was a relatively heavy fire on only one floor, all the others were minor. And those fires caused all support columns to fail SIMULTANEOUSLY? Once again, WHO do you think you are kidding?



People like you really make me sick, you disgusting disinfo shill. Yuck!

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27 Dad April 12, 2009 at 5:30 pm
Thaks Sherm, now we know which buildings to avoid.



36 kevin April 13, 2009 at 6:24 am
(linkback) Believe or Doubt? Exotic High Tech Explosives Positively Identified in WTC Dust [VOTE] -http://www.pikk.com/e8fbf

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41 Robin April 13, 2009 at 6:35 pm
First. Lkistir, my oven rack bent under the load of two cast iron frying pans during the normal 3 hour self cleaning oven cycle. Maybe the alloy in my oven racks are softer than yours or you didn't run the full cleaning cycle.



How many of the witnesses have ever heard a "real" explosion? Are they basing their experiences on what they have seen on TV or movies? Many of the sounds in movies and TV programs are produced by sound technicians. Look up "foley artists".



I can simulate the sound of an explosion and make it look like an explosion with the use of flour and plywood. If you didn't see me do this, you would have sworn there was an explosion.



As for the comment "People like you really make me sick, you disgusting disinfo shill. Yuck!" just shows that you are so biased that you really don't care about the truth but belittling those that oppose your point of view. Oh well.



I have read through the paper in fine details. I have checked some of the references and have found some trends that are not very scientific. Along the line of the Intelligent Design crowd.



Now for the scientists that wrote this paper. They have spent the much of their time looking at ways to prove their thoughts of conspiracy. They have presented the same evidence in multiple papers with basically different titles looking to get this reaction. They are so focussed on their fight that they have blinded themselves from being true scientists and not looking at the facts. I say this because I work with scientists day in and day out. Physicists, mathematicians, chemists and engineers. I know how biases can affect real work from first hand experience.



1. The percentage of "thermite type" material from the paper is about 0.1% of the samples. Now if you are getting 2cm of dust at a location hundreds of meters away, that means the amount of thermetic material has to be in the tonnes.



2. The planes didn't take out only one floor. They took out and damaged multiple floors. You can see this in the pictures from the outside, especially the ones with people in the hole.



3. The Differential Scanning Calorimetry (DSC) tests on the samples correspond with a phase shift in rust power around 500C.



4. The paper keeps refereing to nano-thermites. All papers that I have read on nano-thermites show that the particle sizes are smaller than those being referenced in the paper. Nano-thermites use "nano" sized, not micron sized paricles.



5. On page 17, they reference that the chips don't react to "Methyl Ethyl Ketone" yet their micrograph shows a reduction of about 80%. Now either the pictures are wrong or the the paper is wrong.



6. Much of the WTC had issues with rust. There are many pictures available from various sources on the net. These were in locations where fire protection was not present. There are also many reports from before the completion of the towers about fire proofing not being installed properly. Due to this, there were areas that had to be re-fireproofed with modern chemicals. Many of these chemicals are applied at sum millimetre thickness's. Could these be dust particles from these areas?



7. The "scientists" compare a known metal substance to paint in the MEK tests. Did they use a paint that was used in the WTC construction or renovations? Did they test against any known metallized paint or fireproofing materials? Not from what I can read in the paper. BTW, MEK is combustible and explosive.



8. No procedure listed on how they tested the samples. This is standard procedure in a "true scientific" paper.



9. Take a look at references to the operators of the Open Chemical Physics Journal. I have yet to see any good news about the publishers and their peer reviewers. In one case, one scientist actually was asked by the site to be a reviewer but it was not in his field.



I have passed this paper onto a couple of scientists that are interested in the 9/11 incident and I will be looking forward to their response.



I have worked with thermite in the past. I have seen and how it reacts. I have seen the damage caused by flour when it explodes in a grain elevator. I have seen the effects of design flaws in construction caused by nature (Tacoma narrows bridge).



The World Trade Centres were not built like most steel and concrete high rises. Only buildings built and constructed the same way can be compared in the cases of damage by fire and/or explosions.



Now for some other science.



Look at simulations used in the engineering field. One of the programs that is used for Fluid Dynamic is LS-Dyna. It can be used for blast studies.



http://www.ara.com/Projects/SVO/blast_response.html

http://www.ara.com/Projects/SVO/NIST_WTC.htm

http://www.luxinzheng.net/news/enwtc.html

http://www.cs.purdue.edu/homes/cmh/simulation/ http://www.cs.purdue.edu/homes/cmh/simulation/

http://blogs.zdnet.com/BTL/?p=5442

YouTube of some of the above Prudue simulations.

http://www.youtube.com/watch?v=cjq-yK2ak_U&feature=related

Note that if you don't believe in Finite Elemental Analysis, then you had better be careful because it is used in many engineering fields.



A true scientist looks at facts and will even admit that they are wrong when the evidence shows such. I don't believe that these so called scientists. Look up the references of each of the scientists. I only looked up the first 4 and only Niels H. Harrit came up with any reference other than 9/11. This shows a bias towards a conspiracy.



To me, this is like asking the Intelligent Design "Scientists" to approve the school science curriculum and to write the 'True Facts on Darwin.'



Search about Thermobaric Weapons and Fuel Air explosions. The amount of destruction that these cause is quite interesting. Vaporised fuel from the impacts could have caused mini fuel air explosions.

Kevin, thanks for the link to the poll.

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46 Lee April 14, 2009 at 5:52 pm
I don't understand the point of arguing against papers like this in the comments section. It's a blow-hard, ego-stroking way to get noticed, but it doesn't prove anything.



The article in question may need to be properly fact checked, so be it. But what makes YOU the expert to disprove it so vehemently?



This sums up what I'm thinking:

"On the internet, nobody knows you're a dog."



Why should we trust you any more than we trust the "crazy conspiracy theorists" ? Just because you can post some links to some sites and argue theory doesn't mean you know what happened any better than anyone else.



I'm not saying the high-tech explosives article is correct, I'm saying arguing about the validity of it on the comments section of yet another news-blog is childish and egotistical. If you have some real facts to bring to the table, why don't YOU write a paper about it? Oh, and make sure it's peer-reviewed.

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----------------------------------------------------------

Chris April 16, 2009 at 12:02 am
Lee, you read my mind.

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. 6 bandidobob April 18, 2009 at 8:49 am
Art Sherm shure went out of his way to write a bunch of junk! In so many pictures on the net I've noted too many

steel I beems that were perfectly cut horizontally! WTF!

Art seems to blame weakening bolts…nonsense. Dr. Steven Jones has found thermite in samples of the steel & Dr. harrit with 8 other scientists from Coppenhagen have concluded unspent nanothermite in DUST that was

from the twin towers. This is scary because only the U.S.

military has possession of this hightech material. NIST is definitely involved with this coverup! The 911 commission report is totally bogus crap. Nist is guilty of not only fabricating bullshit science, but also guilty of not

updating public scientific facts. It's truly amazing that NIST still stands behind the "pancake" conspiracy. Shhh…Nist doesn't want to speak of bldg #7! NIST is a

waste of our tax dollars. Abolish NIST!

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. 7 bandidobob April 18, 2009 at 8:50 am
Beems were cut vertically…..sorry

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. 16 Robin May 2, 2009 at 1:22 am
I am no expert. I am not a scientist. I am a truth seeker. I have worked with metals, chemicals and other materials that I cannot discuss. Real experts earn the term from their peers and opponents. A true expert is respected by those for and against him. I have not earned that nor will I ever earn it in the field of explosives. I do work with scientists and I am married to one.



I have analysed videos of all types in my line of work and I have gone over the so-called evidence presented by these so called scientists. I have seen videos of explosions at 10,000 frames per second involving structures and buildings. I have looked at many 911 videos over the years. Many in a frame by frame analysis with software procedures that I have used to bring out details at work.



I have discussed 9/11 over the years from people that do know a lot about construction, metallurgy, concrete and cement, chemistry, explosives and many more fields all related to what is discussed. These are real scientists that have many peer reviewed papers in real journals published and presented around the world.



I have been involved with investigations into accidents that have involved explosive materials. Small amounts but enough to kill, maim and injure people. I have seen the damage done to 1" steel by concrete with a high momentum.



I have seen and experienced real explosions at EMRT (While on course) and other locations.



http://en.wikipedia.org/wiki/Energetic_Materials_Research_and_Training

A true scientist will look at all possibilities before making a conclusion. Non of the papers ever presented by these scientists have done that. I have read some of their other papers and they are on a mission. It may be noble, but it isn't being done with true science. A biased scientist is just a lay person trying to look like a scientist.



It is no different that a company paying for research to prove their point. They make sure that all the tests and studies are skewed towards the answer that they want. It happens all the time when money is involved.



If you want to research, don't look at the videos on YouTube. Find MPG's of the files. Flash videos are so compressed that they look like garbage. Next, get a good CRT monitor. LCD monitors cannot display a full range of color as they don't have a decent "Static" contrast ratio. You can get some good LCD monitors if you have over $10,000 for one. We have a couple at work.



Learn how to set up the color balance and gamma of the monitor. Gamma is very important to seeing details.



This is a pretty good video to work with. It has been processed so there are some artefacts in it. But it is a good general video coverage.



911-Chronology-Source-Impact-Collection.mpg



I have no idea what the audio says as I am only looking at the frames. I have never seen it before and it was something I just found with Google. It is not the best and doesn't include the one scene that I was looking for that I have at work. All comments are made as I see the video for the first time.



About frame 1753, you get to see the second plane hit.

Frame 2744 is even better as you get to see a profile of the second plane hitting. Frames 2755 shows the wing start ripping through the side of the tower, just before the fuel ignites. In frame 2808, you start to see pieces of the plane launch eject past the buildings that are obstructing the view. How much damage was done to the inside of the central support of the tower? Damage was done on three sides of the exterior support. Three of the main supports for the tower have now been weakened.



Now, how much over stress was designed into the exterior of the building? 10%, 50%, 100%? If 50% was used, then it was getting pretty close to failure as over 50% was damaged on one side and 10% to more on the side facing the camera in the second picture as well as over 10% on the third side. This is clearly visible in the video. I wonder how many houses would remain standing with holes that covered over 50% of their walls? Now try that on three walls.



If you want to look at frame 8466, you will see the second plane impact again. At frame 8537, you can see the debris field from the impact eject from the building.



At frame 9448, you see a close-up of the side of one tower. You will see smoke coming from multiple floors.



10060 show the second plane impact from a reverse angle. In frame 10085, you see the material being ejected from the impact.



Frame 24521 shows a nice profile fo the damage done to the exterior of one of the towers. Look at the amount of damage. How much stuctural support is left in the exterior? How many floors are on fire?



33417 is an interesting start to the collapse. You see the collapse start and as the inside of the building come down, it starts pushing all the air out like a bellows of a foot pump. This causes burning debris to be ejected out of the building.



Now to get really interesting. Look at frame 33598 and just off center on the bottom, you will see a piece of the exterior wall that didn't collapse with the upper stories. It looks like it had already been isolated from the rest of the building by the plane impact. By frame 33634, it is out of the scene.



Frame 47111 again show smoke from upper stories above the plane collision.



Starting at frame 48063, you see parts of the first tower to collapse and be ejected outside the range from behind the tower. Not a sign of a controlled explosion.



Now to see something really interesting that shows the forces involved with the collision of the second plane.



Starting in frame 50983, you will see the damage to the first tower hit. You can see the extent of the damage to two sides of the tower. Count how many support beams are left intact if you really want the truth. But that digressed from the point I am trying to make.



In frame 51005, you will not see much smoke from the left side of the first tower hit. In 51007, you will start to see smoke being drawn out from the tower. This is caused by the shock wave of the fuel explosion.



Now this is just a quick review of the video on hand. Nothing exhaustive or with any video processing. Just looking at this mpg. No monitor calibration before doing it either.



If it wasn't so late, I would continue but I cannot be bothered any more.



More reading.

http://en.wikipedia.org/wiki/Compressive_stress http://en.wikipedia.org/wiki/Shear_stress http://en.wikipedia.org/wiki/Momentum http://en.wikipedia.org/wiki/Kinetic_energy

An interesting video.

http://www.youtube.com/watch?v=nWlsMFjrQ0M

Look at videos of plane crashes. The planes burn and melt. Aluminium burns at a very high temperature.



If you remember the Falklands war, the British lost a ship due to fire from the rocket motor of a missile. The aluminium frame burnt and melted. Look for the Sheffield in this article.

http://en.wikipedia.org/wiki/Falklands_War#Sinking_of_HMS_Sheffield

Here is an interesting pdf file. Where was the plane or explosives involved in this. Note the difference in construction between the WTC and this building.



http://www.ncdr.nat.gov.tw/iwerr/doc/pdf/S12%20PDF/s12-1.pdf

Fire damage to steel research.

http://fire-research.group.shef.ac.uk/

Papers published.

http://fire-research.group.shef.ac.uk/completed.html

One study with photos.

http://fire-research.group.shef.ac.uk/downloads.html

See the damage done by a fire. Look at the data and see the temperature involved.



This is an interesting page.

http://guardian.150m.com/fire/small/cardington.htm

Now if you want to argue these points, provide your own evidence from sources other than conspiracy sites. I am willing to listen and analyse the data. I have stated why I believe what I do. Generate your own evidence and facts.

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. 21 Robin May 2, 2009 at 9:15 pm
Well, I made a post this morning and I see that it was deleted after being accepted. I guess the truth was against the conspiracy..



I know that it was on this page as I read it again before closing out.



To answer the question on why to provide evidence is simple. A simple comment wouldn't have gotten any reaction. At least I got a reaction.

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. 22 Robin May 2, 2009 at 9:24 pm
Funny, for some reason, my post that I just made, made my last night post appear. Strange happenings.



I do not post this for ego or anything other than the truth. I may never look at this site again. My kids give me the ego boost that I enjoy.



Think about the the conspiracy theories. They say steel buildings don't collapse because of fires. The reports and pictures show that steel structures do have partial collapses due to fires.

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. 31 Geezerpower May 3, 2009 at 11:22 pm
lol, don't be intimidated by Arthur folks, he does have an associate degree in fire fighting, but his major was psychology.



Actually all three buildings could have fallen without fire or anything, and it could all be explained with hypothetical scenarios and a budget of millions of $.



After all, it's silly to question the official government story, and even if they did do it, it was to keep us safe… G:



ps: Mums the word, just hang on to all the evidence you can get your hands on.

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. 36 Swing Trading October 30, 2009 at 6:37 am
Interesting post. I have just bookmarked this at stumbleupon. Others no doubt will like it like I did.

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. 38 Steve December 20, 2009 at 5:23 am
As I have whatched many videos of the South tower calapse, I have noticed at the fire line at the North East cornerof the South tower, molten metal pouring out of the building and streaming down the the side of the building This happened just before the building colapsed. I have seen Thermite look and act like this.

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