Petty Officer 2nd Class Christopher Wall pulls down the side of a helicopter dunker to flip it upside down during under water egress training in the Aviation Survival Training Center, Marine Corps Air Station Cherry Point, N.C., Oct. 8, 2014. Aviation Marines and Sailors strapped into the dunker for a series of performance tests simulating day and night dunks under varying conditions.
Cpl. Grace L. Waladkewics
Taken on 8 October 2014
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