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NIST should be commended for at least addressing a number of the serious questions that have been raised with regard to its investigation. That NIST fails to support its key assertion that "collapse initiation" automatically leads to "global collapse".
That NIST uses the diversionary tactic of describing some events -- such as the airliner crashes -- in great detailwhile almost completely avoiding the core question of what brought the Towers down.
That NIST's report is internally inconsistent, supposing that steel columns were heated to temperatures hundreds of degrees in excess of the maximum temperatures indicated by its steel samples. That NIST fails to substantiate its implied claim that its computer models predicted "collapse initiation".
That NIST fails to even address most of the features of the Towers' destruction that are apparently unique to controlled demolitions. All sections of the report listed in this document are available at http: Questions Index Although NIST poses several serious questions, it also highlights a number of questions that have little or nothing to do with the case that controlled demolition was the cause of the collapse of the Twin Towers.
In order to clarify how NIST's questions relate to the case for controlled demolition, I have color-coded the questions in the following index of questions. If the World Trade Center WTC towers were designed to withstand multiple impacts by Boeing aircraft, why did the impact of individual s cause so much damage?
How could the WTC towers have collapsed without a controlled demolition since no steel-frame, high-rise buildings have ever before or since been brought down due to fires? Temperatures due to fire don't get hot enough for buildings to collapse.
Weren't the puffs of smoke that were seen, as the collapse of each WTC tower starts, evidence of controlled demolition explosions? Why were two distinct spikes—one for each tower—seen in seismic records before the towers collapsed?
Isn't this indicative of an explosion occurring in each tower? How could the WTC towers collapse in only 11 seconds WTC 1 and 9 seconds WTC 2 —speeds that approximate that of a ball dropped from similar height in a vacuum with no air resistance?
Since the melting point of steel is about 2, degrees Fahrenheit, the temperature of jet fuel fires does not exceed 1, degrees Fahrenheit and Underwriters Laboratories UL certified the steel in the WTC towers to 2, degrees Fahrenheit for six hours, how could fires have impacted the steel enough to bring down the WTC towers?
We know that the sprinkler systems were activated because survivors reported water in the stairwells. If the sprinklers were working, how could there be a 'raging inferno' in the WTC towers? If thick black smoke is characteristic of an oxygen-starved, lower temperature, less intense fire, why was thick black smoke exiting the WTC towers when the fires inside were supposed to be extremely hot?
Why were people seen in the gaps left by the plane impacts if the heat from the fires behind them was so excessive? Why do some photographs show a yellow stream of molten metal pouring down the side of WTC2 that NIST claims was aluminum from the crashed plane although aluminum burns with a white glow?
Was the steel tested for explosives or thermite residues?
The combination of thermite and sulfur called thermate "slices through steel like a hot knife through butter. Is a controlled demolition hypothesis being considered to explain the collapse? The 14 Questions 1. As stated in Section 5. Since the approach to structural modeling was developed for the NIST WTC investigation, the technical capability available to the PANYNJ and its consultants and contractors to perform such analyses in the s would have been quite limited in comparison to the capabilities brought to bear in the NIST investigation.
The damage from the impact of a Boeing aircraft which is about 20 percent bigger than a Boeing into each tower is well documented in NCSTAR The massive damage was caused by the large mass of the aircraft, their high speed and momentum, which severed the relatively light steel of the exterior columns on the impact floors.
The results of the NIST impact analyses matched well with observations from photos and videos and analysis of recovered WTC steel of exterior damage and of the amount and location of debris exiting from the buildings.
This agreement supports the premise that the structural damage to the towers was due to the aircraft impact and not to any alternative forces.
If NIST's computer models really do show collapse initiation, why don't they disclose those models? NIST's first answer reeks of propaganda: In fact, the steel on a single floor of the tower weighed ten times as much as a The Economic Impact in the U.S.
Hotel Industry after the Terrorist Attacks (Title) on September 11, meeting the needs of their companies and customers after the terrorist attacks on September 11, However, to obtain a better outcome, the research only studied September 11, , toppling its twin story towers.
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To start your summary, youneed to write a thesis statement. This is generally the first sentence or the last sentence of your introductory paragraph.
This is generally the first sentence or the. "9/11 Truth movement" is the collective name of loosely affiliated organizations and individuals that question whether the United States government, agencies of the United States or individuals within such agencies were either responsible for or purposefully complicit in the September 11 attacks.