Changilass,
The building collapsed as it did due to the floors below giving way under the weight of the collapsing floors above them.
This also accounts for the theory that "explosions" were seen (as puffs of 'smoke') below the segment which was collapsing. It was the force of the pressure wave created by the floors above falling actually ejecting debris out of the side of the building.
Several compacted floors and their contents are stored in a building - the remains are about 8 feet thick....
But then the building rigged with explosives sounds so much more intriguing....
Bookmarks