What was Obama doing while terrorists attacked Americans in Benghazi? You couldn’t help but feel for Robert Lovell. The retired brigadier general is haunted by the failure of AFRICOM, the U.S. military’s Africa Command, to respond when Americans were under siege in Benghazi on September 11, 2012. His congressional testimony this week was somber — no faux “What difference, at this point, does it make?” indignation, no “Dude, this was two years ago” juvenilia for him. Ambassador Christopher Stevens and the State Department’s Sean Smith were killed in the early stage of the jihadist attack. By then, the actions that...