FILE - In this April 17, 1989, file photo, a worker makes his way across the polluted shore of Block Island, Alaska, as efforts are underway to test techniques to clean up the oil spill of the tanker Exxon Valdez in Prince William Sound. The worker periodically uses the bucket to scoop up oil washing back onto shore from the containment booms. Nearly 25 years after the Exxon Valdez oil spill off the coast of Alaska, some damage heals, some effects linger in Prince William Sound. (AP Photo/John Gaps III, File)
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