James Clapper, Robert Mueller

FBI Director Robert Mueller, left, and Director of National Intelligence James Clapper, listen on Capitol Hill  in Washington, Tuesday, Jan. 31, 2012, during a Senate Intelligence Committee hearing to assess current and future national security threats. (AP Photo/Jacquelyn Martin)

Jacquelyn Martin

FBI Director Robert Mueller, left, and Director of National Intelligence James Clapper, listen on Capitol Hill in Washington, Tuesday, Jan. 31, 2012, during a Senate Intelligence Committee hearing to assess current and future national security threats. (AP Photo/Jacquelyn Martin)