Inside the U.S. Coast Guard’s unusual winter mission to the Arctic
The only functional U.S. icebreaker reached the northernmost ever for a U.S. surface ship on a winter mission.

Before noon on Christmas Day, the heavy icebreaker Polar Star reached the latitude of 72 degrees 11 minutes North — the furthest north a U.S. surface vessels has sailed in winter — before turning to head south for a port call in Dutch Harbor, the U.S. Coast Guard said.
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