On the evening of September 11, 2012, Islamic militants attacked the American diplomatic compound in Benghazi, Libya, killing U.S. Ambassador J. Christopher Stevens and U.S. Foreign Service Information Management Officer Sean Smith. Stevens was the first U.S. Ambassador killed on duty since 1979. Several hours later, a second assault targeted a different compound about one mile away, killing two CIA contractors, Tyrone S. Woods and Glen Doherty. Ten others were also injured in the attacks. The United States immediately increased security worldwide at diplomatic and military facilities and...