A decomposed fish lies in the water as workers pick up oil balls from the Deepwater Horizon oil spill in Waveland, Mississippi in this July 7, 2010 file photo. BP Plc has accepted a $4 billion payment from partner Anadarko Petroleum toward the Gulf of Mexico oil spill clean-up, far less... View Photo »
Fire boats battle the blazing remnants of the off shore oil rig Deepwater Horizon, off Louisiana, in this April 21, 2010 handout file photo. BP Plc promised improved drilling practices on July 15, 2011 as the company. balances twin aims of rebuilding investor and public confidence.... View Photo »
ST. PETERSBURG, RUSSIA - JUNE 17: Robert Dudley (L), Group Chief Executive, Executive Member of the Board of Directors of BP Plc. attends the St. Petersburg International Economic Forum (SPIEF) on June 17, 2011 in St. Petersburg, Russia. Global business leaders have gathered in Russia... View Photo »
ST. PETERSBURG, RUSSIA - JUNE 17: Robert Dudley, Group Chief Executive and Executive Member of the Board of Directors of BP Plc. , attends the St. Petersburg International Economic Forum (SPIEF) on June 17, 2011 in St. Petersburg, Russia. Global business leaders have gathered in Russia... View Photo »
ST. PETERSBURG, RUSSIA - JUNE 17: Robert Dudley, Group Chief Executive and Executive Member of the Board of Directors of BP Plc. , attends the St. Petersburg International Economic Forum (SPIEF) on June 17, 2011 in St. Petersburg, Russia. Global business leaders have gathered in Russia... View Photo »
ST. PETERSBURG, RUSSIA - JUNE 17: Robert Dudley, Group Chief Executive and Executive Member of the Board of Directors of BP Plc. , attends the St. Petersburg International Economic Forum (SPIEF) on June 17, 2011 in St. Petersburg, Russia. Global business leaders have gathered in Russia... View Photo »
A BP logo is seen on a petrol station in London in this November 2, 2010 file photo. BP Plc has agreed to provide $1 billion for projects in the Gulf of Mexico to restore natural resources damaged by last year's oil spill, the company and the U.S. Justice Department said on April 21, 2011. View Photo »
BP logos are seen at a one of the company's petrol stations in Grangemouth, central Scotland in this April 29, 2008 file photo. BP Plc has agreed to provide $1 billion for projects in the Gulf of Mexico to restore natural resources damaged by last year's oil spill, the company and the... View Photo »
An aircraft flies over a British Petroleum petrol station at Heathrow in London in this February 2, 2010 file photograph. BP Plc has agreed to provide $1 billion for projects in the Gulf of Mexico to restore natural resources damaged by last year's oil spill, the company and the U.S.... View Photo »
An exhausted oil-covered brown pelican sits in a pool of oil along Queen Bess Island Pelican Rookery, 3 miles (4.8 km) northeast of Grand Isle, Louisiana in this June 5, 2010 file photo. BP Plc has filed a lawsuit against Halliburton, the company that cemented the blown-out well which... View Photo »
Smoke billows from a controlled burn of spilled oil off the Louisiana coast in the Gulf of Mexico coast line in this June 13, 2010 file photo. BP Plc has filed a lawsuit against Halliburton, the company that cemented the blown-out well which caused the Gulf of Mexico oil spill, on April... View Photo »
Light from a flashlight shines on a cross for Adam Weise, a floorhand who died in the Deepwater Horizon oil rig explosion, during a vigil to mark the first anniversary of the BP PLC oil spill on a beach in Grand Isle, La. , Wednesday, April 20, 2011. View Photo »
People gather near a cross representing the Gulf of Mexico during a vigil to mark the first anniversary of the BP PLC oil spill on a beach in Grand Isle, La. , Wednesday, April 20, 2011. View Photo »
People gather near crosses -- 11 for the workers who died in the Deepwater Horizon oil rig explosion and one for the Gulf of Mexico, center -- during a vigil to mark the first anniversary of the BP PLC oil spill on a beach in Grand Isle, La. , Wednesday, April 20, 2011. View Photo »
Betty Doud lights candles in front of crosses representing the 11 victims of the Deepwater Horizon oil rig explosion before a vigil to mark the first anniversary of the BP PLC oil spill on a beach in Grand Isle, La. , Wednesday, April 20, 2011. View Photo »
Betty Doud lights candles in front of crosses representing the 11 victims of the Deepwater Horizon oil rig explosion before a vigil to mark the first anniversary of the BP PLC oil spill on a beach in Grand Isle, La. , Wednesday, April 20, 2011. View Photo »
Wisner Properties Field Inspector Forrest Travirca walks in an area of dead marsh grass that was impacted by oil from the BP PLC oil spill on Fourchon Beach in Port Fourchon, La. , Wednesday, April 20, 2011. Even as somber remembrances marked the first anniversary of the worst offshore... View Photo »
A cross with the words "promises made," referring to promises made by BP PLC and government officials responding to the Deepwater Horizon oil spill, stands in front of a pile of crosses symbolizing things that were impacted by the spill in a front yard in Grand Isle, La. , Wednesday,... View Photo »
Roger Scheuermann, commercial director of the Helix Well Containment Group, stands next to its 71-ton steel capping stack designed to seal ruptured deepwater oil and gas wells in the Gulf of Mexico, in Houston, in this picture taken April 13, 2011. Nearly a year after BP Plc's Gulf of... View Photo »
Dan Smallwood, chief operating officer of the Marine Well Containment Company, stands next to a 100-ton steel capping stack designed to contain leaking deepwater oil wells in Houston, in this picture taken April 15, 2011. Nearly a year after BP Plc's Gulf of Mexico oil spill spurred a... View Photo »