What caused all that dust, if it wasn't the WTC?
Drywall for one.
If we do a little math, we can estimate how much drywall was in the WTC towers.
The towers were 208'X208'X12'. Agreed? Good.
Now, a commercial drywall piece is 4'X12'.
So, using those dimensions, we can find out aproximately how much drywall was JUST on the outer perimeter walls.
So, each perimeter wall contained 52 pieces. 4/208=52.
Now, 4 walls, that is 208 pieces PER floor. Multiply that by 110 floors, and we get 22,880 pieces JUST in the outer walls. Now, this doesn't account for the returns in the windows, but it also doesn't account for the window gaps themselves, so we will call it even.
So, 22,880 PER tower, just for the perimeter walls. Now, two towers, and we have 45,760 pieces for both towers.
Now, crush those with hundreds of tons of weight, and what do you think it is going to do?
Create a ****LOAD of DUST.