U.S. sailors aboard the aircraft carrier USS Harry S. Truman (CVN 75) fire M240 and .50-caliber machine guns during a night live-fire exercise in the Atlantic Ocean Jan. 27, 2013. The Harry S. Truman was under way in the U.S. 2nd Fleet area of responsibility participating in a composite training unit exercise in preparation for a scheduled deployment. (U.S. Navy photo by Mass Communication Specialist 3rd Class Rob Aylward/Released)