Airmen fueling the fight
U.S. Air Force Staff Sgt. Mark Harschfeld, 52nd Logistics Readiness Squadron NCO in charge of the fuels laboratory and Helena, Mont., native, performs a bottle-method test on JP-8 fuel at Spangdahlem Air Base, Germany, May 23, 2014. On average, 48,000 gallons of JP-8 fuel is issued daily. (U.S. Air Force photo by Airman 1st Class Kyle Gese/Released)