170509-N-TV230-125 PACIFIC OCEAN (May 9, 2017) Hull Maintenance Technician Fireman Anthony Linderoth grinds a door hinge aboard the aircraft carrier USS Theodore Roosevelt (CVN 71) during a group sail training unit exercise. Group sail is the first step in the ship's integrated training phase and aims to enhance mission-readiness and warfighting capabilities between the ships, air wings and the staffs through simulated real-world scenarios. (U.S. Navy photo by Mass Communication Specialist Seaman Bill M. Sanders/Released)