150417-N-TC437-220 PACIFIC OCEAN (April 17, 2015) Airman Tyler Krumtum and Aviation Structural Mechanic 2nd Class Edwin Hanson prepare to chock and chain an MH-60S Sea Hawk helicopter from the Chargers of Helicopter Sea Combat Squadron (HSC)14 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)