A Polish air force F-16V Viper approaches a U.S. Air Force KC-135 Stratotanker assigned to the 100th Air Refueling Wing, RAF Mildenhall, England, to be refueled during Exercise Baltic Operations, over Poland, June 9, 2020. NATO is vital to Euro-Atlantic security. NATO Allies take every opportunity to train together to refine tactics, techniques and procedures, enhancing our ability to seamlessly operate together. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)