Director of the Central Intelligence Agency John Brennan makes a point while he holds a rare news conference at the CIA Headquarters in Virginia

Director of the Central Intelligence Agency John Brennan makes a point while he holds a rare news conference at the CIA Headquarters in Virginia December 11, 2014. Brennan said on Thursday some agency officers used "abhorrent" methods on detainees captured following the September 11 attacks and said it was "unknowable" whether so-called enhanced interrogation techniques yielded useful intelligence. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS) - RTR4HOR7