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Originally Posted by RF_Erick
Ok I see 47 columns, If a pancake theory happened, how do 47 metal beams break off all the way to the ground? Wouldnt the metal beams on lower floors still stand while the floors around collapse at free fall speed? Can 47 thick metal beams just vaporize?
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Thermate was used to melt them in the lower 5 floors in the basement, then charges were set at key floors to blow them out, that's why all you see is a plume.