U.S. Sailors Lt. Gregory W. Boggs, front, an aeromedical safety officer assigned to Marine Aircraft Group (MAG) 29 and HM2 Anthony J. Bartolini, an aeromedical safety corpsman assigned to MAG-26, tread water during a water survival training exercise at Marine Corps Air Station Cherry Point, N.C., Dec. 8, 2014. The exercise was conducted to familiarize the Sailors with the air crew endurance survival vests. (U.S. Marine Corps photo by Cpl. Yosselyn A. Munnerlyn/Released)