When U.S. commandos grabbed a former al Qaeda operative in Tripoli this month, American forces were just hours away from potentially launching a more dangerous covert raid to capture a militia figure facing charges in the deadly Benghazi terror attack, U.S. officials tell CNN. U.S. special operations forces were ready, if ordered, to enter Benghazi and capture Ahmed Abu Khattalah, a leading figure in the Ansar Al-Sharia militia. But the mission never materialized.