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So heres a bit of evidence. Let me know what you think.
http://journalof911studies.com/volume/200609/WhyIndeedDidtheWorldTradeCenterBuildingsCompletelyCollapse.pdf


In reply to your comment:
“Irishman:

The towers simply did not collapse at "free-fall speed". Further, you suggest that they couldn't have collapsed due to "burning aviation fuel", but you seem to have mysteriously forgotten a rather significant additional factor -- the high-speed impact of a commercial airliner.

Choggie:

I think this is around the eleventh time I've asked you this, but do you actually have any evidence whatsoever to support your absurd fantasies regarding 9/11 and controlled demolitions?”