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James Clapper, John Brennan, Michael Flynn, Robert Mueller

James Clapper, John Brennan, Michael Flynn, Robert Mueller

From left, FBI Director Robert Mueller, National Intelligence Director James Clapper; CIA Director John Brennan, and Department of Defense's Defense Intelligence Agency Director Lt. Gen. Michael Flynn, testify on Capitol Hill in Washington, Thursday, April 11, 2013, before the House Intelligence Committee hearing on worldwide threats. (AP Photo/Manuel Balce Ceneta)