Proof???...you mean videotaped recordings of the planning sessions? People who are going to do these things don't go out of their way to claim responsiblity or give warnings.

There has been plenty of circumstantial evidence quite strong enough to stand up in court! We even have tapes of bin Laden referring to his prior knowlege of the events and delight at how much better it worked out than what he expected....we have guys with AlQaida ties enrolling in flight schools..(one even tried to learn to 'steer' a plane, without wanting to land it..wonder why?)

ahhh...why do I bother? People will believe what they wish. I don't claim our government gets everything right or that they make all the 'right' decisions based on the evidence....but there is little doubt what general batch of fanatics pulled off this attack..