Under questioning by Republicans, Democrats, FBI director defends surveillance programs

WASHINGTON — FBI Director Robert Mueller on Thursday defended a pair of controversial government surveillance programs, telling Congress that leaking information on them harms national security. In his last appearance as FBI director before the House Judiciary Committee, Mueller said that terrorists track leaked information “very, very closely” and that because of leaks “we lose our ability to get their communications” and “we are exceptionally vulnerable.” Responding...