Tug runs aground on Exxon Valdez reef

Two decades after the Exxon Valdez tanker disaster, a tugboat working to prevent another oil spill in Alaska’s Prince William Sound ran aground on the same reef and left a three-mile sheen of fuel oil on the water.

The Pathfinder had just finished checking for dangerous ice and was heading back to port in Valdez when it hit Bligh Reef.