Big wheels out for a spin
U.S. Air Force Staff Sgt. Jason Holmes, 31st Civil Engineer Squadron fire company officer, directs an Airman through a serpentine cone course, July 22, 2015, at Aviano Air Base, Italy. Airmen are trained to drive engine trucks and airport rescue fire fighting and mobile water supply vehicles. (U.S. Air Force photo by Airman 1st Class Cary Smith/Released)