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ICE BREAKER DVIDS. en Sault Ste Marie Mich Jan The Coast Guard Cutter Mackinaw clears shipping track through the ice of the St Marys River Jan USCG photo by PAC Jeff Hall Chief Petty Officer Jeff Hall dvidshub net SAULT SAINTE MARIE MI US PDUSGov USCGC Mackinaw WAGB Images from DoD uploaded by Frozen St Marys River MichiganOntario