An independent review of the attack on the U.S. mission in Benghazi cites "systemic failures and leadership and management deficiencies" at high levels of the State Department.
The review also concluded that "there was no protest prior to the attacks."
U.S. Ambassador to Libya J. Christopher Stevens and three other Americans were killed in the September 11 attack on the U.S. consulate in Benghazi, Libya.
Statements by U.S. officials after the attack sparked political debate over whether the Obama administration has been forthcoming about its understanding of events.
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