Marines trudge up a steep hill for a six-mile conditioning hike Feb. 12, 2016, at Camp Pendleton, Calif. The six-mile hike, held by I Marine Expeditionary Force Headquarters Group, sought to improve operational readiness and build camaraderie through tough, realistic physical training. These Marines are with I MHG Combat Service Support Company. ( Marine Corps photo by Lance Cpl. Justin E. Bowles)

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