Rigorous Intuition has a nice story (again confirming what was obvious if you were paying attention) about the dishonesty of the offical US reports into "intelligence failures" regarding 9/11.

As the article states, Daniel Hopsicker's investigations show clearly that the FBI must have known immediately after the attacks exactly who was suspected (Mohammed Atta et al) and where they had been (Huffman Aviation in Venice Florida). Their visits there were more concerned with intimidating people who knew anything that with gathering evidence.

See also Hopsicker's book.