150418-N-TC437-030 PACIFIC OCEAN (April 18, 2015) Sailors participate in a mass causality drill on the flight deck aboard 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 Ignacio D. Perez/Released)