mobile offshore drilling unit Development Driller III
GULF of MEXICO - The mobile offshore drilling unit Development Driller III at the Deepwater Horizon site May 7, 2010. The rig was brought in to drill a relief well to help stop the flow of oil from a wellhead that was damaged when the Deepwater Horizon rig exploded April 20, 2010. (USCG)10Spill0507-G-8744K-005