Libya: Benghazi clash exposes cracks in rebel ranks

Rebel fighters challenging the rule of Col. Muammar el-Qaddafi waged an eight-hour gunfight here in their de facto capital on Sunday, against what their leaders called a 'fifth column' of Qaddafi loyalists who had posed as a rebel brigade. It was the latest sign of discord and trickery in the rebel ranks to emerge in the four days since the killing of the rebels’ top military leader, Gen. Abdul Fattah Younes, a former Qaddafi confidant who had defected to their side. The mysterious circumstances of his death have raised new questions about his own loyalties, and about the unity and discipline of the rebel troops.