Conspiracy theorists have long claimed that explosives downed World Trade Center 7, north of the Twin Towers. The long-awaited report from the National Institute of Standards and Technology (NIST) conclusively rebuts those claims. Fire alone brought down the building, the report concludes, pointing to thermal expansion of key structural members as the culprit. The report also raises concerns that other large buildings might be more vulnerable to fire-induced structural failure than previously thought.
"Hypothetical blast events did not play a role in the collapse of WTC 7," the report states
NIST will accept public comment on the final report until Sept. 15, 2008.
The report determines that the actual culprit in the collapse was the combustion of ordinary building furnishings
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