A new report indicates that there were dozens of CIA operatives at the Annex in Benghazi when the nearby consulate was attacked. According to unnamed sources, the CIA is going to extraordinary lengths to keep their operations there a secret.

CNN reports that 35 Americans were in Benghazi during the attack, seven of whom were wounded. One source calls the current effort to silence those with knowledge of what happened that night unprecedented. CIA operatives are reportedly being subjected to frequent, even monthly, polygraph tests to insure they remain silent.

Robert Baer, an analyst with knowledge of CIA procedures, tells CNN “If somebody is being polygraphed every month, or every two months it’s

called an issue polygraph, and that means that the polygraph division

suspects something, or they’re looking for something, or they’re on a

fishing expedition. But it’s absolutely not routine at all to be

polygraphed monthly, or bi-monthly.”

The new revelations are consistent with claims that people with knowledge of what happened in Benghazi were being asked or pressured to sign additional non-disclosure agreements. Rep. Frank Wolf claimed that his office had been told this last month.

The story also refers to behind-the-scenes activity as pure intimidation. One unnamed insider tells CNN ” You have no idea the amount of pressure being brought to bear on anyone with knowledge of this operation.” The goal of the pressure is to prevent anyone from talking to “the media or Congress.”