On a cold March night 25 years ago, the supertanker Exxon Valdez struck a reef off the coast of Alaska, spilling 11 million gallons of crude oil into the sea.
Images of oil-soaked birds and fouled beaches horrified the United States, leading to tighter regulation and greater environmental consciousness.
The Exxon Valdez grounding on March 24, 1989, has since been replaced by the 2010 Deepwater Horizon disaster in the Gulf of Mexico as the worst oil spill in US history.
Yet local communities in the formerly pristine Prince William Sound are suffering.
"There is a lot of bitterness s...