Reuters is reporting via Twitter that the latest efforts to stop the BP oil leak using robots has failed.
Reuters' exact message is:
FLASH: Robots fail to close valves at leaking BP oil well
Thursday, BP began the process of lowering a 4-story concrete dome 5,000 feet underwater in an effort to contain the spill. Robots and underwater equipment must be used to place the dome on the ocean floor.
We will update you on this developing story.