Crewmembers aboard the Coast Guard Cutter Polar Star break ice as the cutter transits through McMurdo Sound near Antarctica on Monday, Jan. 8, 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.
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