And if they had ignored it, and these guys blew up the Golden Gate Bridge, you would be yelling about the incompetence of the FBI and CIA, and how they missed obvious clues. Give them a break.

That being said, an all-points public bulletin may have been overkill, although even an internal one would have leaked to the press.

Also, I agree that the authorities seem to have had a tendency to put a lot of weight on information gleaned from one or two informants or prisoners, the latter of which it goes without saying have no real incentive to tell the truth. It's hard to tell looking at it from the outside.