A file photo shows a view of the Deepwater Horizon Blowout Preventer. The unified command has approved a plan that utilizes Remotely Operated Vehicles (ROV) in an effort to activate the blowout preventer on the sea floor and to stop the flow of oil.
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A robotic arm of a Remotely Operated Vehicle (ROV) attempts to activate the Deepwater Horizon Blowout Preventor (BOP)
It has not worked.