BP's Lamar McKay, Transocean's Steven Newman and Halliburton's Tim Probert testifies on the BP oil rig accident in Washington

Lamar McKay (L), President and Chairman at BP America Inc., Steven Newman, President and CEO of Transocean Ltd, and Tim Probert of Halliburton, are sworn in during a Senate Energy and Natural Resources Committee hearing on BP's Deepwater Horizon oil rig accident in the Gulf of Mexico, in Washington on May 11, 2010. UPI/Kevin Dietsch