GULF OF MEXICO - Richard Robson, offshore installation manager for the Transocean Development Driller III, explains the controls for the blow-out preventer to Jane Holl Lute, deputy secretary Department of Homeland Security, and David J. Hayes, deputy secretary of the Department of the Interior, aboard the Discovery Driller III here, May 20, 2010. The Discovery Driller III is a mobile-offshore drilling unit and is currently drilling the relief well in the Deepwater Horizon response efforts. U.S. Coast Guard photo by Petty Officer 3rd Class Barry Bena.