U.S. Marines from 3rd Marine Expeditionary force deployed from Okinawa, Japan, participate in the winter military training exercise with South Korean soldiers on January 24, 2017 in Pyeongchang-gun, South Korea. U.S. and South Korean marines participate in the endurance exercise in temperature below minus 20 degrees celsius under a scenario to defend the country from any possible attacks from North Korea. (Photo by Chung Sung-Jun/Getty Images)
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