U.S. Air Force Col. David Lopez, 1st Fighter Wing commander, addresses students attending the new F-22 Fuel System and On-Board Inert Gas Generating course at Joint Base Langley-Eustis, Virginia, March 10, 2021. In-house fuels training ensures commanders at all levels within the maintenance field have qualified technicians from the lowest ranks to the highest, aligning with National Defense Strategy and Chief of Staff of the Air Force priorities. (Photo by Staff Sgt. Ericha Fitzgerald)