Gen. Khalifa Haftr, the self-proclaimed commander of the Free Libyan Army, does not dress for battle. On a recent day after his forces had reclaimed much of the territory they had lost, the commander was wearing a pinstripe suit and a black turtleneck sweater. Haftr, who lived in Fairfax, Va., until recent weeks when he returned to join the rebellion against Moammar Gadhafi, was appointed to lead the rebel army earlier this month. His top aides appear to be his sons. It is difficult for the media as well as the Obama administration to determine who, if anyone, is in...