This report is an unclassified version of the full report that the Office of the Inspector General (OIG) completed in 2004 and provided to the Federal Bureau of Investigation (FBI), the Department of Justice, the Congress, the Central Intelligence Agency, the National Security Agency, and the National Commission on Terrorist Attacks Upon the United States. The OIG's full report is classified at the Top Secret/SCI level. At the request of members of Congress, after issuing the full report the OIG created an unclassified version of the report. However, because the unclassified version included information about the FBI's investigation of Zacarias Moussaoui, and because of Moussaoui's trial in the United States District Court for the Eastern District of Virginia and the rules of that Court, the OIG could not release the unclassified version of the report without the Court's permission until the trial was completed. In June 2005, the Court gave the OIG permission to release the sections of the unclassified report that did not discuss Moussaoui. Therefore, at that time the OIG released publicly a version of the unclassified report that did not contain Chapter 4 (the OIG's review of the Mousssaoui matter), as well as other references to Moussaoui throughout the report. The Moussaoui case concluded on May 4, 2006, when the Court sentenced Moussaoui to life in prison. The OIG then prepared this document, an unclassified version of the full report that includes the information related to Moussaoui. On June 19, 2006, the OIG is releasing this full version of the unclassified report, which includes the Moussaoui chapter and other references to Moussaoui throughout the report, as well as the other chapters that previously were released publicly.A Review of
the FBI's Handling of Intelligence Information
Related to the September 11 AttacksOffice of the Inspector General
Unclassified Version
U.S. Department of Justice
June 19, 2006Chapter 1 Introduction [1.1 MB PDF file]
Statement Regarding Initial Release of the Redacted, Unclassified Version of the IG Report, June 7, 2005Chapter 2 Background [4.5 MB PDF file]
Chapter 3 The FBI's Handling of the Phoenix Electronic Communication and Other Information Relating to Use of Airplanes in Terrorist Attacks [4.1 MB PDF file]
Chapter 4 The FBI's Investigation of Zacarias Moussaoui [12.7 MB]
Chapter 5 Two September 11 Hijackers: Khalid Al-Mihdhar and Nawaf Al-Hazmi [13.5 MB PDF file]
Chapter 6 Recommendations and Conclusions [1.4 MB PDF file]
Appendices [6.6 MB PDF file]