It is well documented that the terrorists that took the flying lessons did not concentrate on landing. They never intended landing the planes.
As for experts and simulators. Have you seen Scully? Have you never heard the marines that say Lee Harvey Oswald couldn't have fired 3 shots in the time he did.
Have you ever watched the Ancient Alien programmes on Discovery or the Chariots of the Gods theories? These people can be so convincing but then along comes an expert and totally destroys their arguments.
There are people who believe the Da Vince Code and Dan Brown does a great job but it is all utter nonsense.
So fighter jets were scrambled in 1999 when there was no response from Payne Stewart's private jet after everyone on board died yet there wasn't one to be seen when 4 'rogue' passenger planes flew for up to nearly 2 hours.....Hmmmmmmmm
How did the guy know his way about all the instruments in a Boeing cockpit when he struggled in a tiny Cessna and impossibly fly 20ft from the ground at 450mph with precision (experienced pilots words,not mine)
How did a 47 steel concrete storey building untouched by a plane suddenly collapse in a perfectly simultaneously way,the official reason was fire as burning debris fell on it.......what a pile of fucking shite