U.S. Air Force Staff Sgt. Sean Scott, 435th Air Ground Operations Wing, radar air and weather systems NCO, explains the equipment and procedures of the deployable air traffic control and landing systems to Air Force Chief of Staff Gen. David L. Goldfein and Secretary of the Air Force Barbara Barrett during briefing on Ramstein Air Base, Germany, Nov. 22. 2019. The systems allow for mobile operations and logistical coverage in otherwise insupportable areas. (U.S. Air Force photo by Senior Airman Milton Hamilton)