The U.S. Coast Guard working in partnership with BP PLC, local residents, and other federal agencies conducted the in situ burn to aid in preventing the spread of oil. (REUTERS/Mass Communication Specialist 2nd Class Justin Stumberg-US Navy) The crew of a Basler BT-67 fixed wing aircraft releases oil dispersant over parts of the oil spill off the shore of Louisiana in this May 5, 2010 photograph