File - This April 3, 2017 photo provided by Cook Inlet Spill Prevention and Response, Inc. shows pan ice taken during an agency overflight near a Hilcorp Alaska LLC offshore platform in Cook Inlet, Alaska. Alaska's Cook Inlet is home to endangered beluga whales, a significant slice of the state's wild salmon population, and along the sea floor, a spider web of petroleum pipelines. So when natural gas was found spewing from an underwater pipeline belonging to the area's largest petroleum producer, alarm bells went off. (Derek Samora/CISPRI via AP, File)
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