BARKSDALE AIR FORCE BASE, La. --   Airman 1st Class William Archer and Staff Sgt. Jeremy Caraan, 96th Aircraft Maintenance Unit crew chiefs prepare to disinfect a B-52H Stratofortress during Global Thunder 21 at Barksdale Air Force Base, La., Oct. 22, 2020. GLOBAL THUNDER is an annual command and control exercise designed to train U.S. Strategic Command forces and assess joint operational readiness. (U.S. Air Force photo by Airman 1st Class Jacob B. Wrightsman)