A NATO AWACS, assigned to the NATO Airborne Early Warning and Control Force, prepares to conduct air refueling operations 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)