:Good question.  There is a Fox News article about it here.  The assertions made by Judicial Watch appear to be speculative based on heavily redacted documents; and if used in Wikipedia, their speculative nature would need to be clear.  Some interesting quotes:  (first from Judicial Watch): "If he was working for us, to then kill him, that's an extraordinary decision."  And from the FBI: "The FBI and investigating bodies have not found evidence connecting Anwar al-Awlaki and the attack on Sept. 11, 2001. The document referenced does not link Anwar al-Awlaki with any purchase of airline tickets for the hijackers."