In message , at 17:49:21 on
Mon, 25 Jul 2005, Charles Ellson remarked:
I don't recall the towers falling over as a result of the impact. It was
the subsequent fire which toppled them (and even then, they fell mainly
downwards, rather than sideways).

There also seemed to be a hint both in the manner of collapse and in
later reports that the construction style was not an unrelated factor.

In terms of fire, perhaps. But the OP specifically mentioned *impact*.
--
Roland Perry