Minutes before supertanker Exxon Valdez ran aground on Bligh Reef, before rocks ripped a huge hole in her hull and a geyser of crude oil darkened Prince William Sound's pristine waters, the ship's lookout burst through the chart room door. "That light, sir, it's still on the starboard side. It should be to port, sir." Her frantic words were merely the last in a litany of futile warnings. The parade of ultimately unkept promises began...