KENNER, La. - Ronald Sepulvado, BP well site leader from the Deepwater Horizon rig, swears in at the joint investigation hearing, July 20, 2010. The Coast Guard and the Bureau of Ocean Energy Management, Regulation, and Enforcement (BOEM) are co-chairing the joint investigation launched to determine the cause of the initial incident and fire aboard the mobile offshore drilling unit (MODU) Deepwater Horizon. U. S. Coast Guard photo by Petty Officer 3rd Class Casey J. Ranel.
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