Prince William Sound, AK (Mar. 28)--Cleanup continues as workers steam blast rocks and washdown shorelines soaked in crude oil from the leaking tanker Exxon Valdez. The Exxon Valdez ran aground on Bligh Reef in Prince William Sound, Alaska, March 23, 1989 spilling 11 million gallons of crude oil, which resulted in the largest oil spill in U.S. history. U.S. COAST GUARD PHOTO