"Pursuant to Title III of the Omnibus Diplomatic and Antiterrorism Act of 1986, 22 U.S.C. § 4831 et seq., (the "Act"), Secretary of State Hillary Rodham Clinton convened an Accountability Review Board (ARB) for Benghazi to examine the facts and circumstances surrounding the September 11-12, 2012, killings of four U.S. government personnel, including the U.S. Ambassador to Libya, John Christopher Stevens, in Benghazi, Libya. A series of attacks on September 11-12, 2012 involving arson, small-arms and machine-gun fire, and use of rocket-propelled grenades (RPGs), grenades and mortars, focused on two U.S. facilities in Benghazi, as well as U.S. personnel en route between the two facilities. In addition, the attacks severely wounded two U.S. personnel, injured three Libyan contract guards and resulted in the destruction and abandonment of both facilities--the U.S. Special Mission compound (SMC) and Annex. Four Board members were selected by the Secretary of State and one member from the intelligence community (IC) was selected by the Director for National Intelligence. Ambassador Thomas R. Pickering served as Chairman, with Admiral Michael Mullen as Vice Chairman. Additional members were Catherine Bertini, Richard Shinnick, and Hugh Turner, who represented the IC. The criminal investigation of the September 11-12, 2012, Benghazi attacks, for which the statutory responsibility rests with the Federal Bureau of Investigation (FBI), was still underway at the time of this report. The Board enjoyed excellent cooperation with the Department of Justice and FBI throughout preparation of this report. The key questions surrounding the identity, actions and motivations of the perpetrators remain to be determined by the ongoing criminal investigation. As called for by the Act, this report examines: whether the attacks were security related; whether security systems and procedures were adequate and implemented properly; the impact of intelligence and information availability; whether any other facts or circumstances in these cases may be relevant to appropriate security management of U.S. missions worldwide; and, finally, whether any U.S. government employee or contractor, as defined by the Act, breached her or his duty."--Introduction.