Pyeongchang, South Korea, Dec. 19, 2017: U.S. and South Korean Marines get airborne during a short workout.

About 400 U.S. and South Korean Marines took a break from honing their winter-warfare skills for some friendly competition. After doffing their shirts and yelling half-naked in the snow, the allies teamed up to battle each other in chicken fights, relay races and a free-for-all wrestling match.

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