Sailors assigned to the Royal Navy Type 45 destroyer HMS Dragon (D35) man the bridge during a replenishment at sea with the dry cargo ammunition ship USNS William McLean (T-AKE 12) May 20, 2021 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.