U.S. Marine Corps Lance Cpl. Teondre J. Perry, a motor transportation operator with Marine Wing Support Squadron 274, performs the crawl stroke while attending a Water Survival Advanced Course held aboard Marine Corps Air Station Cherry Point, N.C., Aug. 4, 2014. Students were tested on their ability to rescue distressed Marines while in the water simulating real life scenarios. (U.S. Marine Corps photo by Lance Cpl. Jodson B. Graves/Released)