In this Thursday, July 6, 2017 photo, first officer Jukka Vuosalmi, right, and second officer Ilkka Alhoke look out from the bridge during a night shift while piloting the Finnish icebreaker MSV Nordica as it sails the North Pacific Ocean to traverse the Northwest Passage through the Canadian Arctic Archipelago. Most of the 21 regular crew work 12-hour shifts. (AP Photo/David Goldman)
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