Joseph Keith testifies at Deepwater Joint Investigation Hearings

HOUSTON - Capt. Hung Nguyen, co-chair of the Deepwater Horizon joint investigation, questions Joseph Keith, a senior mud logger for Sperry Sun, December 7, 2010. The Coast Guard and the Bureau of Ocean Energy Management, Regulation and Enforcement (BOEM) are co-chairing the fact-finding 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 Richard Brahm.