HOUMA, La. -- A Basler BT-67 fixed wing aircraft loaded with oil dispersant heads down the runway at Houma-Terrebonne Airport to attack the oil spill from the mobile offshore oil drilling unit, Deepwater Horizon from the sky. To date, the unified response has dropped 156, 364 gallons of oil dispersant on the spill. U.S. Coast Guard photo by Petty Officer 3rd Class Stephen Lehmann.