Bild: Petty Officer 2nd Class Justin Stumberg | Dark clouds of smoke and fire emerge as oil burns during a controlled fire in the Gulf of Mexico, May 6, 2010. The U.S. Coast Guard, working with BP, local residents and other federal agencies, conducted the burn to help prevent the spread of oil following the explosion on Deepwater Horizon, an offshore drilling unit | 6.05.2010 | public domain