A very intelligent question. Too bad we could not try atta, and the other ones that attacked us. But wait, thinking the way you do, we could have a post-mortus trial to see if they were actually terrorists. Belonging to al-queda and attacking civilians is no proof of being a terrorist.
I agree. Tough to try them with suicide built into their repertoire.
How about the attorney that the FBI linked to the Madrid bombings. Maybe we should have executed him without a trial.
Oops -- he was innocent...