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Icebreaker opens shipping channels in the Upper Peninsula

The United States Coast Guard icebreaker Mackinaw is tied up in the upper St. Mary's River on Monday, March 20, 2017, in Sault Ste. Marie, Michigan. The heavy icebreaker will lead two other small ships in opening shipping channels for the upcoming 2017-2018 season, which begins at midnight March 24th.

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Icebreaker opens shipping channels in the Upper Peninsula