CIA director Michael Hayden arrived back on Capitol Hill Dec. 12 to answer questions from a House committee about the destruction of videotapes of CIA terror suspect interrogations.
Hayden testified about the same topic before a Senate panel on Dec. 11.
The head of the intelligence committee, Senator Jay Rockefeller, says what lawmakers heard was useful but incomplete.
The interrogations took place in 2002 and the tapes were destroyed in 2005, but Hayden didn't take over the agency until 2006.
He's promising to make people available for questioning who might know more about the subject.