Tugboats tow the oil tanker Exxon Valdez off Bligh Reef in Prince William Sound 05 April 1989 to a harbor near Naked Island for repair and salvage efforts, two week after the beginning of an oil disaster which occurred when the tanker Exxon Valdez ran aground 24 March 1989 and spilled 11 million gallons of crude oil into Prince William Sound off Alaska. Photo: CHRIS WILKINS, AFP/Getty Images / 2013 AFP