The U.S. Coast Guard Polar Star Class Icebreaker USCG POLAR SEA (WAGB 11) sits on the ice after a day-long ice breaking operation around McMurdo Sound, Antarctica, on Mar. 15, 2007. The POLAR SEA is participating in Operation Deep Freeze 2007 by keeping a clear and navigable channel for supply ships to get goods, supplies, and equipment to the research personnel working at McMurdo Station. (U.S. Coast Guard photo by Petty Officer 2nd Class Kevin J. Neff) (Released)

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