Twenty years ago, in the early hours of March 24th 1989 the Exxon Valdez super-tanker runs aground in Alaska. Millions of gallons of crude oil wash ashore and the incident becomes the biggest environmental catastrophe in North American history. For weeks dramatic images of dead seabirds and sea otters covered in oil shoot across the planet. For twenty years now Riki Ott and the fishermen of the little town of Cordova, Alaska have waged the longest legal battle in U.S. history against the world’s most powerful oil company – Exxon Mobil, a battle which came to an end in June 2008 before the USA Supreme Court, practically exonerating the company.