U.S. Air Force Tech. Sgt. Paris Bell, 435th CRS airfield manager, secures an initial operating perimeter after joint forcible entry into Cheshnegirovo Airfield, Bulgaria, during exercise Swift Response 21, May 11, 2021. The 435th Contingency Response Group provides 24/7 alert capabilities through scalable, cross-functional and rapidly deployable forces. (U.S. Air Force photo by Senior Airman John R. Wright)