The Coast Guard Cutter Polar Star’s damage controlmen salute Capt. Matthew Walker, commanding officer, after receiving medals they earned while underway in McMurdo Sound, Antarctica, Jan. 28, 2016. The damage controlmen used their metalworking expertise to conduct critical structural and machinery repairs during Operation Deep Freeze 2016. (U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst)
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