U.S. Defense Secretary Jim Mattis testifies to the House Armed Services Committee in Washington

U.S. Defense Secretary Jim Mattis testifies to the House Armed Services Committee in Washington

US Defense Secretary Jim Mattis testifies to the House Armed Services Committee on "The National Defense Strategy and the Nuclear Posture Review" on Capitol Hill in Washington, U.S., February 6, 2018. Photo: Reuters/Joshua Roberts

February 7, 2018 4:28 AM (UTC+8)