Senior Chief Petty Officer Kevin Ball, a culinary specialist aboard the Coast Guard Cutter Polar Star, places an Antarctica Service pin on his cover after earning his Antarctica Service Medal, given after spending 10 consecutive days at sea below the Antarctic Circle, on Tuesday, Jan. 16, 2018. The crew of the Seattle-based Polar Star is on deployment to Antarctica in support of Operation Deep Freeze 2018, the U.S. military’s contribution to the National Science Foundation-managed U.S. Antarctic Program. U.S. Coast Guard photo by Chief Petty Officer Nick Ameen.