peabody award for the coverage of the oil spill disaster along the gulf last year. it's our 16th peabody award. cnn has followed the cleanup. what if the coastline is never really clean? david mattingly has this exclusive look. >> reporter: louisiana officials are watching their worst predictions come true, bp oil damages to sensitive marshes may be permanent. are these marshes done for? >> this area is likely going to be open water in a few years. this is what this 40-acre section of marsh looked like when the oil hit last may. the syrupy crude i saw then was just the beginning of the problem. returning ten months later, the louisiana governor's office gave me an exclusive and disturbing look inside the damaged eco system. i could still see oil everywhere. sticking to the plants. it's like tar. so sticky. look at that. it's also saturated the fragile