U.S. Air Force Airmen assigned to the 435th Contingency Response Group and U.S. Army Soldiers assigned to the 173rd Infantry Brigade board a C-17 Globemaster III aircraft for joint forcible entry into Cheshnegirovo Airfield, Bulgaria, during exercise Swift Response 21 at Pápa Air Base, Hungary, May 11, 2021. The 435th CRG, attached to the 435th Air Ground Operations Wing located at Ramstein Air Base, Germany, is the only contingency response force in the U.S. Air Force that maintains an airborne insertion capability. (U.S. Air Force photo by Senior Airman John R. Wright)