A NATO AWACS assigned to the NATO Airborne Early Warning & Control Force prepares to aerially refuel over Europe, May 17, 2023. NATO Air Base Geilenkirchen hosts air refueling units from around the United States to perform air-to-air refueling for the NATO Airborne Warning and Control System aircraft. (NATO photo by U.S. Air Force Staff Sgt. Andrew D. Sarver)