Assist vessels fire water cannons at the Deepwater Horizon

NEW ORLEANS Assist vessels fire water cannons at the Deepwater Horizon in an attempt to control and extinguish a fire April 21, 2010, which has engulfed the mobile offshore drilling unit after an explosion April 20. Coast Guard helicopters, planes and cutters are responding to the incident. (USCG) 10Spill0421-G-3422A-289