171025-N-AD724-0009 ATLANTIC OCEAN (Oct. 25, 2017) Sailors man a .50 caliber machine gun during a night-time live-fire exercise on the fantail of the Nimitz-class aircraft carrier USS Abraham Lincoln (CVN 72). The ship is underway conducting carrier qualifications and training. (U.S. Navy photo by Mass Communication Specialist Seaman Shane Bryan/Released)