German Navy guided-missile frigate F 220 FGS Hamburg conducts routine operations during At-Sea Demo Formidable Shield 2021. At-Sea Demo/Formidable Shield, conducted by Naval Striking and Support Forces NATO on behalf of U.S. Sixth Fleet, is a live-fire integrated air and missile defense (IAMD) exercise that improves Allied interoperability using NATO command and control reporting structures. (Photo Courtesy of German Navy)