Sgt. Gregory Stewart looks on as a fellow Marine learns proper underwater breathing techniques during a training exercise at Marine Corps Base Camp Lejeune, N.C., Sept. 26, 2016. The Modular Amphibious Egress Training, also known as the Helo Dunker, teaches Marines survival techniques to use if a helicopter lands in the water. Stewart is a crewman with 2nd Light Armored Reconnaissance Battalion. - Sgt. Gregory Stewart looks on as a fellow Marine learns proper underwater breathing techniques during a training exercise at Marine Corps Base Camp Lejeune, N.C., Sept. 26, 2016. The Modular Amphibious Egress Training, also known as the Helo Dunker, teaches Marines survival techniques to use if a helicopter lands in the water. Stewart is a crewman with 2nd Light Armored Reconnaissance Battalion.
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