U.S. sailors shoot an M2HB .50-caliber machine gun during a qualification shoot on the fantail of the aircraft carrier USS Carl Vinson in the U.S. 5th Fleet area of responsibility, Feb. 19, 2015. U.S. sailors shoot an M2HB .50-caliber machine gun during a qualification shoot on the fantail of the aircraft carrier USS Carl Vinson in the U.S. 5th Fleet area of responsibility, Feb. 19, 2015. SHARE: Download: Full Size (0.9 MB) Tags: Photo Essays Credit: VIRIN: 665543-U-NMV32-805.jpg Photo Gallery