Refuel
Airmen in the fuels and On Board Inert Gas Generating System training course learn how the fuels system of an F-22 Raptor works Feb. 2, 2015, at Tyndall Air Force Base, Fla. Airmen from Joint Base Langley-Eustis, Va.; Joint Base Elmendorf-Richardson, Alaska; and Joint Base Pearl Harbor-Hickam, Hawaii, come to Tyndall to train on the system. (U.S. Air Force photo/Airman 1st Class Sergio A. Gamboa)