Reply #44: It's the full height of the buildings,

[dailykoff]

measured from first floor to top floor, as I've explained at least three times. Now before you break out in hives consider that to come up with a useful measurement you have to draw the line somewhere, and there are many points to draw it, such as top of antenna, top of structure, top of roof, and top floor, to name a few.

p.s. about the collapse times: the fact that there was any movement, at free-fall acceleration or otherwise, of the structure below the crash floors is in my view proof that explosives were used to demolish the buildings. There is simply no other credible explanation for the simultaneous disintegration of all that steel, and the NIST has not provided any.