Just returning to this fascinating subject.
I was looking at this picture again
http://femr2.ucoz.com/_ph/2/2/376965454.jpg
Now the only footage I have seen of the plane striking the 2nd tower, it seems to come out of nowhere but flying relatively level, does its turn and strikes perpendicular with excellent penetration.
That was an incredible timing of the descent, to go from so high, plummet rapidly down so low and level off precisely to strike the WTC tower. Easy enough for a pre-programmed flight of course, but otherwise it must have been Allah himself directing the pilot.
I was reading wikipedia
http://en.wikipedia.org/wiki/United_Airlines_Flight_175
and it says
It must have been dropping like an absolute stone.