On Sept. 11, 2012, heavily armed Islamist militants launched an prearranged assault on the U.S. diplomatic mission in Benghazi, Libya, setting fire to buildings before all U.S. personnel could escape or reinforcements could arrive.
The attackers later launched mortar rounds close to CIA compound. The ambassador J. Christopher Stevens and three official Americans were killed in the attack.
This is the first time since 1979 that a U.S. ambassador on duty was killed.
On June 15, 2014, U.S. Special Operations forces arrested one of the alleged leaders of the attacks.