CNN Exclusive: Dozens of CIA operatives on ground during Benghazi attack

CNN has uncovered exclusive new information about what is allegedly happening at the CIA, in the wake of the deadly Benghazi terror attack.

Sources now tell CNN dozens of people working for the CIA were on the ground that night, and that the agency is going to great lengths to make sure whatever it was doing, remains a secret.

CNN has learned the CIA is involved in what one source calls an unprecedented attempt to keep the spy agency's Benghazi secrets from ever leaking out.

Since January, some CIA operatives involved in the agency's missions in Libya, have been subjected to frequent, even monthly polygraph examinations, according to a source with deep inside knowledge of the agency's workings.

The goal of the questioning, according to sources, is to find out if anyone is talking to the media or Congress.

It is being described as pure intimidation, with the threat that any unauthorized CIA employee who leaks information could face the end of his or her career.

In exclusive communications obtained by CNN, one insider writes, "You don't jeopardize yourself, you jeopardize your family as well."

Another says, "You have no idea the amount of pressure being brought to bear on anyone with knowledge of this operation."

"Agency employees typically are polygraphed every three to four years. Never more than that," said former CIA operative and CNN analyst Robert Baer.

In other words, the rate of the kind of polygraphs alleged by sources is rare.

Among the many secrets still yet to be told about the Benghazi mission, is just how many Americans were there the night of the attack.

A source now tells CNN that number was 35, with as many as seven wounded, some seriously.

While it is still not known how many of them were CIA, a source tells CNN that 21 Americans were working in the building known as the annex, believed to be run by the agency.

The lack of information and pressure to silence CIA operatives is disturbing to U.S. Rep. Frank Wolf, whose district includes CIA headquarters in Langley, Virginia.

"I think it is a form of a cover-up, and I think it's an attempt to push it under the rug, and I think the American people are feeling the same way," said the Republican.

"We should have the people who were on the scene come in, testify under oath, do it publicly, and lay it out. And there really isn't any national security issue involved with regards to that," he said. (Full Story at CNN)