Gen. Abdel Fattah Younis, Libya’s rebel military chief of staff, was shot and killed this morning along with two other commanders on their return trip to Benghazi from Port Brega. Suspicions surrounding the deaths are numerous, but the identity and motives of the gunmen have yet to be revealed. Gen. Younis defected in February to the rebel military after years of working under Gaddafi’s regime as Libya’s interior minister. Doubts concerning his loyalty to the rebel cause were numerous. Nick Childs, world affairs correspondent for the BBC, discusses the possible reasons for Gen. Younis’ assassination and the implications of the attack for Libya and the U.S.