FILE - In this April 1989, file photo, an oil covered bird is examined on an island in Prince William Sound, Alaska, after the Exxon Valdez spill. Thirty years after the supertanker Exxon Valdez hit a reef and spilled about 11 million gallons of oil in Prince William Sound, the state of Alaska is looking whether to change its requirements for oil spill prevention and response plans, a move that one conservationist says could lead to a watering down of environmental regulations. (AP Photo/Jack Smith, File)                                 The Exxon Valdez oil tanker spill March 24, 1989, blackened hundreds of miles of coastline in Alaska's Prince William Sound, devasting wildlife and altering lives in fishing communities for generations. (John Gaps III / Associated Press)
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