The Deepwater Horizon Oil Spill is the largest accidental marine oil spill in the history of the petroleum industry, so far. 11 people died and 17 more were injured when the Macondo rig went down. Over the next 3 months, an estimated 4.9 million barrels of crude oil spilled into Gulf waters, comparable to over 20 Exxon Valdez ships. Two years later, more than 450 miles of shoreline are still covered in oil. BP continues to conduct business as usual.