Before 9/11 planes didn't crash into skyscrapers - at least not since 1946. And a good percentage of us so-called tinfoilers who you claim are cowering under our beds were back here at work in Manhattan on 9/12.
No, your right, they just crashed into the ground, into mountains, into houses, etc. Maybe that was just luck because most airports aren't in the middle of a bunch of skyscrapers (except Hong Kong), who knows.
The only thing we know, is a plane crashed into a building and people are dead. To spin these elaborate multiple-gunmen on the grassy-knoll theories sounds quite silly.