The National Institute of Standards and Technology just-released final report on the collapse of World Trade Center 7 in 2001 following the 9/11 terrorist attack concludes that fire, not controlled demolition, was the cause of 47-story building’s destruction.
At an August 21st news conference, Shyam Sunder, the lead investigator for the federal building and fire safety investigation of the WTC disaster, explained: “Our take-home message today is that the reason for the collapse of World Trade Center 7 is no longer a mystery. WTC 7 collapsed because of fires fueled by office furnishings. It did not collapse from explosives or from diesel fuel fires. It collapsed because fires—similar to those experienced in other tall buildings—burned in the absence of water supply to operate the sprinklers, and burned beyond the ability of firefighters to control fires. It fell because thermal expansion, a phenomenon not considered in current building design practice, caused a fire-induced progressive collapse.”
Sunder directly addressed the question of whether controlled demolition had brought down WTC 7, a favorite theory of the “9/11 Truth Movement” and its celebrity hanger-ons, like Jesse Ventura, Charlie Sheen, and Rosie O’Donnell, noting that the investigative team had considered that possibility and rejected it. NIST concluded that “blast events inside the building did not occur” and “found no evidence supporting the existence of a blast event.” A NIST WTC 7 fact sheet summarized the case against controlled demolition:
In addition, no blast sounds were heard on the audio tracks of video recordings during the collapse of WTC 7 or reported by witnesses. According to calculations by the investigation team, the smallest blast capable of failing the building’s critical column would have resulted in a sound level of 130 decibels (dB) to 140 dB at a distance of at least half a mile, if unobstructed by surrounding buildings. This sound level is consistent with a gunshot blast, standing next to a jet plane engine, and more than 10 times louder than being in front of the speakers at a rock concert.
For the building to have been prepared for intentional demolition, walls and/or column enclosures and fireproofing would have to be removed and replaced without being detected. Preparing a column includes steps such as cutting sections with torches, which produces noxious and odorous fumes. Intentional demolition usually requires applying explosive charges to most, if not all, interior columns, not just one or a limited set of columns in a building.
The NIST WTC 7 team also found another popular 9/11 conspiracy theory, that thermite/thermate was used to sever columns was highly unlikely: “To apply thermite to a large steel column, approximately 0.13 lb of thermite would be needed to heat and melt each pound of steel. For a steel column that weighs approximately 1,000 lbs. per foot, at least 100 lbs. of thermite would need to be placed around the column, ignited, and remain in contact with the vertical steel surface as the thermite reaction took place. This is for one column … presumably, more than one column would have been prepared with thermite, if this approach were to be used.” NIST concluded that it was “unlikely that 100 lbs. of thermite, or more, could have been carried into WTC 7 and placed around columns without being detected, either prior to Sept. 11 or during that day.”
A blow to the 9/11 conspiracy theorists
The final NIST WTC 7 report represents a major blow to the promoters of 9/11 conspiracy theories. They began by claiming that the Twin Towers (WTC 1 and 2) had been felled by controlled demolition as part of a government “false flag operation.” Their argument had obvious flaws—it wasn’t hard to imagine that two large airliners loaded with jet fuel smashing into skyscrapers could inflict massive damage—and that was what the first NIST report concluded.
Their focus then turned to WTC 7, with many conspiracy theorists seizing on the fact that the building was not hit directly by the planes and “mysteriously” collapsed hours later. Again, they argued for controlled demolition, forcefully enough that NIST included explosions as a possible cause for the collapse in its investigation.
With the demolition theory for WTC 7 having been considered and rejected, the 9/11 conspiracy theorists are in a bind. The final NIST report offers what Sunder called a “simple and straightforward and elegant” explanation for the collapse of the building. The simplicity of the theory—that unchecked fires led to a chain of failures and then progressive collapse—and the extensive computer modeling of the hypothesis place it squarely in the best traditions of the scientific method.
The alternative theory advanced by the so-called 9/11 Truthers is far-fetched and requires a complete suspension of disbelief. Professional demolition experts have repeatedly explained that it takes weeks of work to prepare a building for a controlled demolition. And how could such a massive conspiracy, involving hundreds if not thousands of people, be kept silent? And what of the lack of any evidence of an explosion, as pointed out by the NIST team?
Despite the “on-the-record” scientific studies now explaining the WTC disaster, it’s unlikely that all members of the “9/11 Truth Movement” will go away quietly. Some make considerable amounts of money hawking 9/11 conspiracy DVDs and books. Others cling to the notion for deep-seated psychological reasons. Some are deluded. Yet the weight of the evidence is clear: the destruction of the World Trade Center buildings was directly caused by the actions of the 9/11 terrorists. To believe otherwise is to not only embrace an alternative theory, but to accept an alternative reality.
An extended commentary on the 9/11 “Truth Movement” can be found at “Exposing the 9/11 conspiracy fantasies.”