I summarized the information I have read on this topic in an answer on Skeptics.SO: https://skeptics.stackexchange.com/a/31144/1792 https://skeptics.stackexcha

I summarized the information I have read on this topic in an answer on Skeptics.SO: https://skeptics.stackexchange.com/a/31144/1792 https://skeptics.stackexchange.com/a/31144/1792 To quote a much more authoritative Europhysics article that subsequently came out (and which I since put at the head of my answer): > ... The NIST reports, which attempted to support that unlikely conclusion [that a steel frame building collapsed from a fire], fail to persuade a growing number of architects, engineers, and scientists. Instead, the evidence points overwhelmingly to the conclusion that all three buildings were destroyed by controlled demolition. ...