Senior Airman Jacob Hartman checks out the newly painted R-11 refueling truck at the Logistic Readiness Squadron vehicle yard at Luke Air Force Base, Ariz. After receiving waiver approval from the Air Education and Training Command, the 56th LRS had the fuel tank painted white to keep the fuel inside from overheating. The changes to the truck were made because the F-35 Lightning II has a fuel temperature threshold and cannot function properly if the fuel temperature is too high. Hartman is a 56th LRS fuels distribution operator (U.S. Air Force photo/Staff Sgt. Luther Mitchell Jr.)