The leaking oil rig in the Gulf of Mexico has Congress asking many questions.
Three companies involved in the disaster played the blame game on Capitol Hill Tuesday.
British Petroleum's top executive told senators the spill was caused by the failure of a safety device made by another firm. But that company said BP was in charge, and that a third company that poured the concrete for the project did not do it right. The third company said it was just following BP's plan.
Lawmakers wanted to know who is responsible for the final price tag.
"Is BP prepared to pay," Sen. Mary Landrieu, D-La., asked BP chairman and president Lamar McKay.
"We are going to pay all legitimate claims," McKay answered.
"Can you define that," Landrieu asked.
"All substantiated claims," McKay replied.
While their top executive was in Washington, BP experts were in the Gulf, still trying to contain the oil leak.
Now there are signs the slick could be shrinking. BP said it is moving a smaller containment box into place to cap the leak. An earlier attempt using a large containment box to cap the leap failed.