Re: I saw that tape . . .
Wall was virtually unharmed (a couple inches of penetration against several feet of heavily reinforced concrete), and the plane was reduced to dust. All of it. I watched the slow motion play as the section of wall appeared to literally eat that plane from nose to tail.
The wall was marked, but remained unmoved.
Granted, a passenger liner would have had more momentum, but the damage would have been negligible. I have no doubt it was a D.C.-targeting missile, like as not the White House itself. The al Qaeda was after highly visual, globally newsworthy targets.
Dan