The hard questions follow BP CEO Tony Hayward down Pennsylvania Avenue as he travels to the Capitol to testify before the House Energy and Commerce Oversight and Investigations Subcommittee at 10:00 a.m. ET. On the other side of the Hill, the Senate Small Business and Entrepreneurship Committee hears from small businesses who are helping to clean up the spill. One of those small businessmen is Academy Award-winning actor Kevin Costner, whose Ocean Therapy Solutions firm recently sold a device that separates oil from ocean water to BP.

On the federal response side of the Gulf Coast spill, the acting director of the Minerals Management Service, Bob Abbey, answers questions about his agency’s performance after the tragic events aboard the Deepwater Horizon. Incident Commander Adm. Thad Allen briefs lawmakers on the spill at 11:00 a.m. ET, and while the meeting is closed press we’ll be there to get an update from lawmakers and Allen after the information session wraps.

Secretary of State Hillary Clinton, Defense Secretary Robert Gates, and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen start to sell the START nuclear weapons reduction treaty to Congress. At 9:30 a.m. ET, they will tell the Senate Armed Services Committee how the treaty will help secure nuclear weapons around the world.

President Obama’s third nominee to become the head of the Transportation Security Administration, John Pistole, will try to convince the Senate Homeland Security and Governmental Affairs Committee that the third time really is the charm. Obama’s first two nominees withdrew from consideration after questions about their past threatened to torpedo their approval.

House leadership hold their week in review press conferences, and the Senate is still working on a spending bill to extend certain tax breaks and social programs, so there will be plenty of reasons to check back with Fox News for all the latest.