another link
9/11: Debunking The Myths
PM examines the evidence and consults the experts to refute the most persistent conspiracy theories of September 11.
http://www.popularmechanics.com/science/defense/1227842.html
The word I heard from one theorist was that Popular Mechanics mysteriously replaced their entire writing staff just before this piece. So it goes that they MUST have been replaced by the great world conspiracy.
Seriously!