I doubt it'll be proven "without a shadow of a doubt", but the terrorists killed on the planes were all known associates of his. Phone conversations between his followers have been recorded, congratulating each other on a "job well done". For once, thank god for Etchelon.
Put them through COURT?!? However high-and-mightly that might be in the justice system, it's not practical. With 6 or so years for a case review, and appeal, can you imagine the terrorist attacks that will happen to persuade their release?
Blinded BY current events? I think you'll find that's an oxymoron.
So was Hitler. That kind of evil genius should be deplored, not awed.
If that were true, why would powers like China and Russia, who have opposed US policy and actions for
years suddenly feel the need for a favour now?