Ohfergoonessakes! It was fire, not the airplane impact or concussion of fuel explosion that brought the buildings down.

The upper floors, not surprisingly, were built of MUCH lighter girders than the lower floors. I've heard that, for weight reasons, the usual asbestos (or whatever) coating on the girders was skimped or dispensed with. The heat of the fire twisted or buckled the girders, which destroyed the planned play of support from the metal structure, which started the cascade effect of collapse.

Why do some people have such a HUNGER for marvels and dirty secrets and conspiracies?

Dave Oesterreich