U.S. FBI Director James Comey testifies before the House Oversight Committee over investigation into Hillary Clinton's email system, on Capitol Hill in Washington D.C., capital of the United States, July 7, 2016. U.S. FBI Director James Comey on Thursday defended his decision not to recommend charges against Hillary Clinton, but refuted several of her statements to justify the use of private email setup as secretary of state. (Xinhua/Bao Dandan)