A KC-135 Stratotanker performs a refueling connection with a B-52 Stratofortress during Exercise Global Thunder 2019 over the U.S. Northwestern Region, November 2018. Global Thunder is a U.S. Strategic Command exercise designed to ensure an efficient mission response by testing Airmen's ability to execute command, control and operational procedures during simulated combat scenarios. (U.S. Air Force photo/Airman 1st Class Lawrence Sena)