[RJCogburn]

F.B.I. did not obtain a search warrant to examine his computer and other belongings until after the attacks on the World Trade Center and the Pentagon

Do we know what they finally found? Was there information that, had it been known prior to 9/11, would have been helpful in stopping the terror?

[Lion's Cub]

Do we know what they finally found? Was there information that, had it been known prior to 9/11, would have been helpful in stopping the terror?

We know some of it, and yes it would have been helpful.

FEDS SET TO MAKE CASE AGAINST '20TH HIJACKER'
The computer search turned up documents about crop dusting

Indictment expected in hijackings: Suspect is called would-be pilot; anthrax tie seen to conspiracy
He received several thousand dollars from Germany and also had several conversations with the man in Hamburg who rented Atta the apartment where the cell met.