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So speaking of laying the evidence on the table (the subject), what would be a good example of a difference between NIST and others?
Originally posted by Jeff Riff
YES! from this page : killtown.911review.org...
here you go:
PRIOR KNOWLEDGE / PREPARATION
Early '01 Memo Warned of Al Qaeda Threat
….The memo, from former counterterrorism chief Richard A. Clarke to then-national security adviser Condoleezza Rice, had been described during the hearings, but its full contents had not been disclosed…..(Reuters, 12 Feb 05)
Bush team tried to suppress pre-9/11 report into al-Qa'ida
Federal officials were repeatedly warned in the months before the 11 September 2001 terror attacks that Osama bin Laden and al-Qa'ida were planning aircraft hijackings and suicide attacks, according to a new report that the Bush administration has been suppressing….(Belfast Telegraph, 11 Feb 05)
Terror warnings to FAA detailed
The Federal Aviation Administration received repeated warnings in the months prior to Sept. 11, 2001….(AP, 11 Feb 05)
Memo warned Bush of al Qaeda threat
A newly released memo warned the White House at the start of the Bush
administration that al Qaeda represented a threat throughout the Islamic world, a warning that critics said went unheeded by President George W. Bush until the September 11, 2001, attacks….(Reuters, 11 Feb 05)
Sept 11 warnings ignored: report
United States aviation officials failed to respond to dozens of warnings of a possible terrorist threat months before September 11, 2001, according to a previously undisclosed report by the panel that probed the attacks….(Reuters, 11 Feb 05)
FAA ignored pre-9/11 terror alerts
In the months before the attacks of Sept. 11, 2001, federal aviation officials reviewed dozens of intelligence reports that warned about Osama bin Laden and al- Qaeda, some of which specifically discussed airline hijackings and suicide operations, according to a previously undisclosed report from the 9/11 commission…..(New York Times, 10 Feb 05)
9/11 Commission: FAA Was Alerted to Potential Attacks
Federal Aviation Administration officials received 52 warnings ….(AP, 10 Feb 05)
9/11 Report Cites Warnings About Hijackings
U.S. aviation officials failed to respond to dozens of warnings….(Reuters, 10 Feb 05)
Originally posted by ULTIMA1
Originally posted by WraothAscendant
You just don't get what I am trying to say do you?
Yes i do. I am just stating there are obvious things that do not have a "could have meant this or could have meant that"
The point is they did not recover any steel from building 7 for testing (period)
And yes there are any number of reasons why they didn't do that.
Perhaps it was anticipated it would be questioned and help lead to the LOVELY mess we have now in the 9/11 forums (just being an example)?
Originally posted by OrionStars
reply to post by jfj123
In reviewing everything you have written, since I asked my topic questions, it is clear you have no intentions of explaining what science NIST personnal used, to convince you they are correct and others are wrong. At this point, I have no other choice, but to consider you are accepting NIST report at face value. You have given me nothing to say otherwise through, at the very least, your last 5 posts.
At the same time, and until you present valid science as requested, I respectfully request you do not request I prove anything either. Can we agree on that?
Fires Have Never Caused Skyscrapers to Collapse
Excepting the three 9-11 collapses, no fire, however severe, has ever caused a steel framed high-rise building to collapse. Following are examples of high-rise fires that were far more severe than those in WTC 1 and 2, and Building 7. In these precedents, the fires consumed multiple floors, produced extensive window breakage, exhibited large areas of emergent flames, and went on for several hours. The fires in the WTC towers did none of these things.
The early news reports noted how well the towers withstood the initial impact of the aircraft; however, when one recognizes that the buildings had more than 1,000 times the mass of the aircraft and had been designed to resist steady wind loads of 30 times the weight of the aircraft, this ability to withstand the initial impact is hardly surprising. Furthermore, since there was no significant wind on September 11, the outer perimeter columns were only stressed before the impact to around 1/3 of their 200 MPa design allowable.
The only individual metal component of the aircraft that is comparable in strength to the box perimeter columns of the WTC is the keel beam at the bottom of the aircraft fuselage.
Originally posted by jfj123
It seems to be pretty well presented. I've noticed a few people saying that it has been debunked and if it has, that is fine but I've never seen actual evidence debunking the article.
Burning fuel traveling down the elevator shafts would have disrupted the elevator systems and caused extensive damage to the lobbies.
As Jules Naudet entered the North Tower lobby, minutes after the first aircraft struck, he saw victims on fire, a scene he found too horrific to film.
NIST reports that pockets of fire hit 1832°F.
FACT: Once each tower began to collapse, the weight of all the floors above the collapsed zone bore down with pulverizing force on the highest intact floor. Unable to absorb the massive energy, that floor would fail, transmitting the forces to the floor below, allowing the collapse to progress downward through the building in a chain reaction. Engineers call the process "pancaking," and it does not require an explosion to begin, according to David Biggs, a structural engineer at Ryan-Biggs Associates and a member of the American Society of Civil Engineers (ASCE) team that worked on the FEMA report.
"Steel loses about 50 percent of its strength at 1100°F," notes senior engineer Farid Alfawak-hiri of the American Institute of Steel Construction. "And at 1800° it is probably at less than 10 percent." NIST also believes that a great deal of the spray-on fireproofing insulation was likely knocked off the steel beams that were in the path of the crashing jets, leaving the metal more vulnerable to the heat.
"Melted" Steel
Claim: "We have been lied to," announces the Web site AttackOnAmerica.net. "The first lie was that the load of fuel from the aircraft was the cause of structural failure. No kerosene fire can burn hot enough to melt steel." The posting is entitled "Proof Of Controlled Demolition At The WTC."
FACT: Jet fuel burns at 800° to 1500°F, not hot enough to melt steel (2750°F). However, experts agree that for the towers to collapse, their steel frames didn't need to melt, they just had to lose some of their structural strength — and that required exposure to much less heat. "I have never seen melted steel in a building fire," says retired New York deputy fire chief Vincent Dunn, author of The Collapse Of Burning Buildings: A Guide To Fireground Safety. "But I've seen a lot of twisted, warped, bent and sagging steel. What happens is that the steel tries to expand at both ends, but when it can no longer expand, it sags and the surrounding concrete cracks."
"Steel loses about 50 percent of its strength at 1100°F," notes senior engineer Farid Alfawak-hiri of the American Institute of Steel Construction. "And at 1800° it is probably at less than 10 percent." NIST also believes that a great deal of the spray-on fireproofing insulation was likely knocked off the steel beams that were in the path of the crashing jets, leaving the metal more vulnerable to the heat.
But jet fuel wasn't the only thing burning, notes Forman Williams, a professor of engineering at the University of California, San Diego, and one of seven structural engineers and fire experts that PM consulted. He says that while the jet fuel was the catalyst for the WTC fires, the resulting inferno was intensified by the combustible material inside the buildings, including rugs, curtains, furniture and paper. NIST reports that pockets of fire hit 1832°F.
"The jet fuel was the ignition source," Williams tells PM. "It burned for maybe 10 minutes, and [the towers] were still standing in 10 minutes. It was the rest of the stuff burning afterward that was responsible for the heat transfer that eventually brought them down."
FACT: Once each tower began to collapse, the weight of all the floors above the collapsed zone bore down with pulverizing force on the highest intact floor. Unable to absorb the massive energy, that floor would fail, transmitting the forces to the floor below, allowing the collapse to progress downward through the building in a chain reaction. Engineers call the process "pancaking," and it does not require an explosion to begin, according to David Biggs, a structural engineer at Ryan-Biggs Associates and a member of the American Society of Civil Engineers (ASCE) team that worked on the FEMA report.
Originally posted by Griff
Originally posted by jfj123
It seems to be pretty well presented. I've noticed a few people saying that it has been debunked and if it has, that is fine but I've never seen actual evidence debunking the article.
It actually isn't debunkable. You know why? Because the whole thing is built on easily debunkable strawmen.
The rate of corrosion is also unknown. It is possible that this is the result of long-term heating in the ground following the collapse of the buildings. It is also possible that the phenomenon started prior to collapse and accelerated the weakening of the steel structure.
Originally posted by tadlem43
maybe this is a stupid question, but here goes:
in most of the videos from the top of the tower falling you can see the antenna (or whatever) fall straight downward... like in an implosion. it veers neither to the left nor right. if the structure of the building was impeded on one side or the other by heat, destruction of structure, etc, wouldn't the antenna fall to that side?