The crews of Canadian Coast Guard ice breaker Sir Wilfrid Laurier (right), and fishing vessel Frosti, a Canada Department of Fisheries and Oceans-commissioned boat, lead the way through the ice approximately 125 miles east of Barrow, Alaska, July 25, 2017, in support of U.S. Coast Guard Cutter Maple's transit through the Northwest Passage to the Atlantic Ocean. All three crews initially encountered floating ice in a dense fog about 100 miles east of Barrow. (U.S. Coast Guard photo by Petty Officer 2nd Class Nate Littlejohn/Released)