150418-N-TC437-008 PACIFIC OCEAN (April 18, 2015) Sailors simulate fighting an aircraft fire during a mass casualty drill aboard the aircraft carrier USS John C. Stennis (CVN 74). John C. Stennis is undergoing a tailored ship's training availability and final evolution 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 Ignacio D. Perez/Released)