BP CEO Tony Hayward is sworn in on Capitol Hill in Washington, Thursday, June 17, 2010, prior to before testifying before the  Energy and Environment subcommittee on Oversight and Investigations hearing on the role of BP in the Deepwater Horizon Explosion and Oil Spill. (AP Photo/Haraz N. Ghanbari)

Photo by: Haraz N. Ghanbari

BP CEO Tony Hayward is sworn in on Capitol Hill in Washington, Thursday, June 17, 2010, prior to before testifying before the Energy and Environment subcommittee on Oversight and Investigations hearing on the role of BP in the Deepwater Horizon Explosion and Oil Spill. (AP Photo/Haraz N. Ghanbari)