Agree with spagiola on this one - that UA 767 looks like it overcooked the turn into the WTC and only just avoided missing the tower altogether.
I'm sure these bastards had had some flying experience on 757/767 sims at least - the attack seems to have been too well planned to leave something like that to chance - but I don't think they'd have had to be experienced pro pilots or anything. After all, they weren't concerned with returning the aircraft safely to the runway, the bastards.....