There was something on the structural failure on the History Channel. The trade Towers were built diffrently than your contemporary buildings of the time, with an exo-skeleton and steel trusses inside that had fire retardant on them. Over time the reatrdant slowly disintegrated and with the force of the planes hitting the building, the rest was taken off, therefore leving the metal exposed to the absolutely insane temperatures of the planes full of fuel. Once one truss fell, it was just a matter of time before the rest would give and it would simply be a domino effect. Anyone correct me if any part of this is wrong. I tried to summarize it as best I could.
Mariano
Mariano
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