Trainee Jussi Mikkotervo looks out from the bow of the Finnish icebreaker MSV Nordica as it sails through ice floating on the Beaufort Sea off the coast of Alaska while traversing the Arctic's Northwest Passage, Sunday, July 16, 2017. Although the passage presents an attractive shortcut for maritime traffic between the Pacific and Atlantic oceans, only a dozen or two vessels attempt to navigate the poorly charted Canadian Arctic Archipelago during the brief summer window each year. (AP Photo/David Goldman)
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