Marines with 2nd platoon Golf Company, 2nd Battalion, 3rd Marine Regiment, move down trenches through dust kicked up from the use of m67 fragmentation grenades thrown into inlets within the throughway during a live-fire platoon attack at the Infantry Platoon Battle Course, Range 10 in Pohakuloa Training Area, Hawaii, July 20, 2013. The attack was part of Exercise Lava Viper, a battalion-level combined-arms exercise designed to enhance the skills of the ground combat and support element Marines participating. (U.S. Marine Corps photo by Cpl. Matthew Callahan/Released)
Cpl. Matthew Callahan
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