This CNN report details secret efforts by the CIA to aggressively interrogate and polygraph a number of CIA agents who were on the ground in Libya just prior to the Benghazi attack on September 11, 2012 that got four Americans killed at the consulate building. It even mentions the possibility that covert U.S. forces were on the ground in Libya smuggling out weapons to bring to Turkey and subsequently deliver to Syrian rebels.

Related: Former U.S. Special Operations soldiers have claimed for months that the terrorist attack on the Benghazi consulate was retaliation for covert operations, including violent raids on militia encampments near Benghazi.