JOINT BASE BALAD, Iraq -- Senior Airman Matthew Presby, 332nd Expeditionary Logistics Readiness Squadron Fuels Lab technician, shakes a JP-8 jet fuel sample to keep sediment from collecting inside the bottle as part of the filtration process at Joint Base Balad, Iraq, Sept. 29. Airman Presby, who is deployed from Moody Air Force, Ga., and other fuel lab technicians help ensure fuel is clean and ready for use in aircraft. (U.S. Air Force photo by Senior Airman Christopher Hubenthal)