A Review of the FBI's Handling Intelligence Information Related to the September 11 Attacks, US Department of Justice Office of the Inspector General, released June 2006 [noting "numerous systemic problems" during the FBI's investigation of Zacarias Moussaoui prior to the Sept. 11 terrorist attacks "ranging from poor individual performance to more substantial systemic deficiencies that undermined the FBI's efforts to detect and prevent terrorism"]. Read the full text of the report [PDF], including the now fully-unclassified version of Chapter 4 [PDF] on the Moussaoui investigation in particular. Reported in JURIST's Paper Chase here.