The defense team said the FBI had tried to turn at least one member into an informant.
Three people were killed and hundreds wounded in the April 2013 bombing.
The Senate Intelligence Committee has already voted to release the report.
The review suggests CIA officials covered up methods not approved by the government.
Al Qaeda’s leader in Afghanistan is plotting a comeback once U.S. and NATO troops leave the country.
“So the threat is metastasizing. It is much more broad,” he said during a hearing on Thursday.
Mike Morrell said he's afraid terrorists have found a way to evade security with shoe bombs.
Human Rights Watch is calling for a full U.S. investigation of the strike.
The rights to an e-book on Benghazi have been optioned as a film.