Building 7

The third tower, never hit, down in seven seconds. NIST blamed fire; a movement was built on the footage.

World Trade Center 7: the 47-story tower that collapsed at 5:20 pm on 9/11, unstruck by aircraft. Documented: NIST's 2008 report attributed it to fire-induced thermal expansion failing a critical column — the first fire-caused total collapse of a steel high-rise — after seven years of investigation; a truther-funded University of Alaska study (2020) disputed the model. The BBC reported the collapse 23 minutes early (a newsroom error, per the BBC). The single strongest artifact in 9/11 lore because the official explanation is itself a first-of-its-kind event.