Lawmakers also want to about know the weapons in Libya, and what happened to them.
Speculation on Capitol Hill has included the possibility the U.S. agencies operating in Benghazi were secretly helping to move surface-to-air missiles out of Libya, through Turkey, and into the hands of Syrian rebels.
It is clear that two U.S. agencies were operating in Benghazi, one was the State Department and the other was the CIA.
The State Department told CNN in an e-mail that it was only helping the new Libyan government destroy weapons deemed "damaged, aged or too unsafe retain," and that it was not involved in any transfer of weapons to other countries.
But the State Department also clearly told CNN, they "can't speak for any other agencies."
The CIA would not comment on whether it was involved in the transfer of any weapons.