The oil spill: Latest developments

-- Relief-well work: The crew of Transocean's Development Driller II was on track to pour cement starting early Sunday to firm up a section of metal casing lining one of two relief wells.

-- Worst-case scenario: In an internal document, BP estimated that in a worst-case scenario, the Deepwater Horizon well would spill 100,000 barrels per day (4.2 million gallons), not 60,000 barrels (2.52 million gallons) as it said in a document submitted to Congress.

By the numbers

$104 million

Paid by BP to Gulf Coast residents for claims filed as a result of the oil spill.

More than 31,000

The number of checks issued by BP in seven weeks in response to claims.

64,000

Claims received.

1,000

Team members working to process claims.