150417-N-DA737-150 PACIFIC OCEAN (April 17, 2015) Billy Valentine shakes Sailors' hands during a performance with the band Marley's Ghost in the hangar bay of the aircraft carrier USS John C. Stennis (CVN 74). John C. Stennis is undergoing a tailored ship's training availability and final evaluation problem, assessing its abilities to conduct combat missions, support functions and survive complex casualty control situations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jonathan Jiang / Released)