Fact check
Is it true: WTC Building 7: Controlled Demolition Theory?
No — this has been debunked.
NIST's NCSTAR 1A investigation (2008) concluded that WTC 7 collapsed due to progressive structural failure initiated by thermal expansion of floor beams caused by office fires — not by explosive demolition. The collapse was the first documented case of a steel-frame high-rise collapsing primarily from fire. Peer-reviewed structural engineering analyses by Bažant and others are consistent with NIST findings. No physical, chemical, or seismic evidence of explosives has been found. AE911Truth's commissioned Hulsey/UAF 2019 counter-study has not been peer-reviewed and has been rebutted by independent engineers.
The claim
At 5:21 PM on September 11, 2001, World Trade Center Building 7 — a 47-story skyscraper that was not struck by any aircraft — collapsed. The controlled-demolition theory holds that the collapse was pr
Key evidence
Hulsey/UAF 2019 counter-study not peer-reviewed
NIST NCSTAR 1A: progressive collapse from office fires
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