It was here at the courthouse in Benghazi where the first spark of the Libyan revolution ignited. It’s the symbolic seat of the revolution; post-Gaddafi Libya’s equivalent of Egypt’s Tahrir Square. And it was here, in the tumultuous months of civil war, that the ragtag rebel forces established their provisional government and primitive, yet effective, media center from which to tell foreign journalists about their “fight for freedom.” But according to multiple eyewitnesses—myself included—one can now see both the Libyan rebel flag and the flag of al Qaeda fluttering atop Benghazi’s courthouse. According to one Benghazi resident, Islamists are driving...