TEd's post under "New York" prompts this thread. It is not at all word-related, but perhaps some will share my interest and, in the extraordinary circumstances, forgive the digression. Trying to understand what happened, and looking at the news reports as "evidence", has raised a number of questions to me.

For example: each tower collapsed - but each collapsed not at the initial impact, but only some time later. Was there a further cause; in particular, explosives set at of near the base? It would seem an obvious question, but I've heard no news reports on it, not even a report of, "BTW, there was no bomb."

Per the video, each tower seemed to collapse straight down (not tipping off to the side), as if every side of the tower had broken simultaneously near ground-level (that is, far below the height at which the airplanes impacted).

Anyone have thought on this, or other questions to probe?