The crew of Coast Guard Cutter Mackinaw, homeported in Cheboygan, Mich., conducts an escort on Lake Superior near Whitefish Point April 3, 2014. The Mackinaw crew worked together with the crew of Canadian Coast Guard Ship Pierre Radisson, homeported in Quebec City, as part of an ongoing bi-national agreement between the U.S. and Canada, to break sheet ice that was nearly 40 inches thick. (U.S. Coast Guard photo courtesy of Coast Guard Air Station Traverse City)
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