Okay, even if they DID do what you're talking about... A sensible pilot would land the plane as fast as he/she could. There were what, five hundred people on both planes? And there were three thousand killed altogether, along with two of the tallest buildings on earth, which I consider a loss in and of itself.
Force>No, obviously he can't turn back time. But he just SAT THERE for ten minutes, and did nothing. Now, it only takes a bit of common sense to realize that he should at the very least have excused himself politely from the classroom. Now, wait a second... There was something he could have done... Oh yeah, shut down the airlines! That ended up happening anyways, of course, but I highly doubt it was of his own accord. And once again... Would you have just sat there for ten minutes, staring off into space while thousands of people were dying? Any good president would have at least tried to do something.
You know what, f*ck political debate... Both parties suck, one worse than the other, but politics these days are just stupid.