U.S. Coast Guard Cutter Mackinaw breaks ice in Whitefish Bay, Mich., In support of Operation Spring Breakout, March 16, 2009. Spring Breakout encompasses northern Lake Michigan, northern Lake Huron, the St. Marys River and helps facilitate the spring shipping season in the Great lakes. (U.S. Coast Guard photo/Petty Officer 3rd Class George Degener)
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