David Ignatius: Timeline of the Benghazi attack
In this Thursday, Sept. 13, 2012 file photo, an empty bullet casing lies on the ground near one of the burned cars at the U.S. Consulate after an attack that killed four Americans, including Ambassador Chris Stevens on the night of Tuesday, Sept. 11, 2012, in Benghazi, Libya. (AP Photo/Mohammad Hannon)
