Biofuel flight
Maj. Chris Seager, a test pilot with the 40th Flight Test Squadron at Eglin Air Force Base, Fla., along with his crew chief, Staff Sgt. Rusty Jones, performs a pre-flight check on his A-10C Thunderbolt II March 25, 2010. He was preparing for the first flight of an aircraft powered solely by a biomass-derived jet fuel blend. The A-10 was fueled with a 50/50 blend of Hydrotreated Renewable Jet and JP-8. (U.S. Air Force photo/Samuel King Jr.)