Reply #3: Perhaps some go off due to unexpected reasons; but most seem [View All]

[philb]

to have been just before or during the "collapse" sequence

And its clear a lot of them saw the same things.

the newly released NY Police statements had similar reports of explosions, some well before the collapse.

http://www.flcv.com/nypolice.html

Its unlikely a plane with jet fuel would be enough to bring down a big steel framed building. That was the conventional wisdom before 9/11, so there may have been several methods used to expand the damage.
And it appears that the buildings didn't come as straight down as some assume or believe. The tops seem to have fallen on neighboring buildings and streets. There were reports of explosions, tilting top sections, before the collapse in both buildings. And it appeared that the explosions affected the tops first. Except that there also were ground level explosions reported by many, both earlier and just before the "collapse".


But the building core appears to have saved several firefighters and occupants who were towards the bottom of Stairway B in the Core when WTC1 collapsed.