The first shots exploded around 9:40 p.m. On Sept. 11, 2012, a group of local fighters, AK-47s in hand, burst through the fortified front gate of a US outpost in Benghazi, Libya. One very long night later, the diplomatic compound was engulfed in flames and a covert CIA base a mile away lay in ruins, partially reduced to rubble by mortar fire. Four Americans were dead, including Ambassador Christopher Stevens and two CIA members. What happened in between is covered in "13 Hours: The Secret Soldiers of Benghazi," a new film from "Transformers" director Michael Bay in theaters Friday. It...