What has changed? Now, when tankers leave Valdez full of oil, two boats go with them. They can help if there is a problem. There are also lots of machines ready to take away the oil after an accident they can take 46,500,000 liters of oil off the top of the water n seventy-two hours. And every year people precise what to do if there is another oil tanker disaster. Nobody wants another accident in Alaska like the Exxon Valdez, but if an accident does happen, they will be ready to stop so much oil gong onto the beaches, and killing birds and sea animals.