Do you have any idea how much the WTC weighed? Half of it started falling, and accelerating as it fell. Before you say incredibly stupid things like this again you should stop and do the math.Where'd you get this cockamyme story from. There is is no way these floors could have damaged the massive cores on these buildings, let alone bring the both buildings down at free fall speed. DO you even understand what free fall means - NO RESISTANCE !! It means that everything was conveniently destroyed underneath that falling mass = NO resistance = Free Fall.
Hint: that much mass falling that fast delivers many times more force then the bombs you imagine...