LA Times: In past years, these remote gray waters of the Alaskan Arctic saw little more than the occasional cargo barge and Eskimo whaling boat. No more. This summer, when the U.S. Coast Guard cutter Bertholf was monitoring shipping traffic along the desolate tundra coast, its radar displays were often brightly lighted with mysterious targets. There were oil drilling rigs, research vessels, fuel barges, small cruise ships. A few were sailboats that had ventured through the Northwest Passage above Canada….

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