[img]http://d.yimg.com/a/p/ap/20100430/capt.070c0e0abf234beaad6e342e559b2749-e10db298c22f4abebba9930d41ca6990-0.jpg?x=130&y=109&q=85&sig=wmIZgg8Ac3_XQk774pYA0g--[/img]AP - British Petroleum once downplayed the possibility of a catastrophic accident at an offshore rig that exploded, causing the worst U.S. oil spill in decades along the Gulf Coast and endangering shoreline habitat.