"I remember getting a call from the, er, fire department commander, telling me that they were not sure they were gonna be able to contain the fire, and I said, 'We've had such terrible loss of life, maybe the smartest thing to do is pull it.' And they made that decision to pull and we watched the building collapse.""
–WTC owner Larry Silverstein, in PBS documentary "America Rebuilds"

Over the approximately 100-yr. history of steel-framed skyscrapers, many have caught fire, some burning for as long 24 hrs. in massive infernos, yet none have ever completely collapsed–some major portion of the rigid steel skeleton, at least, has always remained standing. If randomly generated fires were, by some strange quirk of fate, able to fell a steel skyscraper, the odds of simultaneous, uniform destruction of support columns, resulting not in a canted toppling over, but a perfectly symmetrical collapse into its own footprint are... infinitesmal small. Except on Sept. 11, when the United States apparently passed through some galactic worm hole, disabling the reigning laws of physics and probability.

"Conspiracy Theorist's" Alternative Explanation:
Larry Silverstein's inadvertent, and now much regretted confession (see sidebar), has survived the attempts to collapse it into an irrelevant footnote: it means exactly what it says—the building was "pulled," in demolition parlance. How it could have been so improvisationally wired within a mere 8 hours, with all the chaos engulfing downtown Manhattan, remains unexplained. And so it should, as that would beg the question:

Could the Twin Towers also have been pre-wired?

For the complete story on WTC7, and the history of skyscraper fires, see:
WTC7.net