190427-N-ZM949-1211 PACIFIC OCEAN (April 27, 2019) Aviation Ordinanceman Airman Matthew Sherman, from Westport, N.Y., left, and Gunner’s Mate 2nd Class Joshua Jenkins, from Clearwater, La., calibrate a .50-caliber machine gun during a live-fire qualification course on the fantail of the aircraft carrier USS Theodore Roosevelt (CVN 71). Theodore Roosevelt is conducting routine operations in the Eastern Pacific. (U.S. Navy photo by Mass Communication Specialist 3rd Class Erick A. Parsons/Released)