Tech. Sgt. Alex Esquibel, noncommissioned officer in charge of wing tactics at the 350th Air Refueling Squadron, looks out the boom window of a KC-135 Stratotanker while refueling an F-22 Raptor during a refueling mission over the Nevada Test and Training Range, Nev., Aug. 6, 2021. The refueling mission was part of exercise Red Flag 21-3. Red Flag exercises began in 1975 as an aerial combat exercise, but has evolved to include warfighting across air, space and cyberspace domains. (U.S. Air Force photo by Airman 1st Class Zachary Rufus)