abundant fish provide a living for thousands of people. and food for millions. the clear water is also home to majestic birds. sea otters. porpoises and whales. it is a national treasure. but on that terrible night 25 years ago, the wreck of the exxon valdez threatened it all. >> it was like a bomb went off in prince william sound. >> marine biologist rick steiner was a professor at the university of alaska. >> there's no great mystery there. oil and water and fish and wildlife don't mix. and we knew that long before exxon valdez. >> that's why the pipeline