U.S. Marine Corps Cpl. Kevin Jackson, Detachment 1, Communication Company, Combat Logistics Regiment 45, 4th Marine Logistics Group wireman, and U.S. Marine Corps Cpl. Luis Barrera, Detachment 1 radio operator, float to remain above water during their Marine Corps water survival training program basic level qualification at Great Lakes Naval Station, Ill., March 21, 2015. During basic level qualifications, Marines have to remove their flak jackets, helmets and rifles in shallow water in less than 10 seconds, enter water from a 15-foot tower simulating an 'abandon ship' technique, tread water for four minutes, and conduct a 25-meter pack-swim. (U.S. Air Force photo/Tech. Sgt. Benjamin Mota)
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