WASHINGTON, DC - JULY 13: Central Intelligence Agency Director John Brennan (R) shakes hands with Bruce Riedel, director of the Brookings Intelligence Project, at the conclusion of an event where Brennan discussed his agency's strategy in the face of emerging challenges at the Brookings Institution July 13, 2016 in Washington, DC. Brennan said, although "enhanced interrogation techniques" employed after the attacks of 9/11 did reveal usable intelligence, he would not lead the CIA if a new president were to order EIT used again. (Photo by Chip Somodevilla/Getty Images)