The story of the last cataclysmic American oil spill has evolved over time into a straightforward tale of cause and effect: In 1989, a hard-drinking skipper ran his tanker aground in Alaska, and Exxon was unable to prevent crude from spreading along hundreds of miles of pristine shoreline.
But the full story of the Exxon Valdez wreck is far more complex, and it offers striking parallels to today's events in the Gulf of Mexico -- including a central role played by a consortium led by British Petroleum, now known as BP.