GULF OF MEXICO - The Transocean drill vessel, Discoverer Inspiration, prepares for drilling operations for the Deepwater Horizon oil response in the Gulf of Mexico, July 10, 2010. The Discoverer Inspiration, an 835-foot ultra-deepwater drilling rig, will lower the capping stack on top of the well to replace the top hat cap that is presently connected to the Discoverer Enterprise. U.S. Coast Guard photo by Petty Officer 1st Class Jonathan Caruk.