FILE - In this Jan. 7, 2013, file photo, a U.S. Army CH-47 Chinook helicopter flies over the Kulluk, the Shell floating drilling barge off Kodiak Island in Alaska's Kiliuda Bay, as salvage teams conduct an in-depth assessment of its seaworthiness. Citing the disappointing results from an exploratory well in 2015, and challenging and unpredictable federal regulatory environment, Shell abandoned drilling in U.S. Arctic waters. The Trump administration is pursuing petroleum lease sales in Arctic waters but an analyst says potential bidders may find other areas more attractive. (James Brooks/Kodiak Daily Mirror via AP, File)
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