Twenty years ago this month, nearly 11 million gallons of crude oil spilled into Alaska's Prince William Sound after the oil tanker Exxon Valdez grounded on a reef. It was and still is the single largest spill to ever occur along the coastal U.S. Join us in this special podcast as we talk with Dr. Alan Mearns, senior staff scientist with NOAA's Office of Response and Restoration. Mearns was involved in the initial spill response for the Exxon Valdez accident, and spent years leading a project that continues to monitor the long-term impact of the huge oil spill.