Well, this is straight out of an episode of Homeland. According to a CNN investigation, dozens of CIA operatives were on the ground in Benghazi, Libya, for a top-secret operation on the night of the September 11 attack that killed four Americans. Sources say that since then, the agency has been conducting polygraph examinations with an unprecedented frequency to ensure that no one has revealed the mission to the media or Congress. “Initially they were not afraid to come forward. They wanted the opportunity, and they wanted to be subpoenaed, because if you're subpoenaed, it sort of protects you ... Now that’s all changed,” says Republican Rep. Frank Wolf, who claims he was contacted by CIA employees in the attack’s aftermath and has repeatedly requested that Congress open a probe.