U.S. Air Force Airmen and Polish special forces members exercise aircraft ground support at an abandoned runway near Biala Podlaska, Poland, during an Aviation Detachment Rotation 21-4, Sept. 15, 2021. The rotations are bilateral training exercises and deployments designed to enhance partner interoperability, maintain joint readiness and support regional allies. U.S. aircraft and Airmen have participated in these rotations since 2012. (U.S. Air Force photo by Airman Edgar Grimaldo)