NORTH SEA (Feb. 22, 2022) The U.S. Navy Arleigh Burke-class guided-missle destroyer USS Donald Cook (DDG 75) conducts a replenishment-at-sea with Standing NATO Maritime Group 1 flagship German navy replenishment ship FGS Berlin (A1411) in the North Sea during Exercise Dynamic Guard 22, Feb. 22, 2022. Dynamic Guard is a bi-annual, multinational maritime electronic warfare exercise series designed to provide tactical training, and help build and maintain electroinic warfare and anti-ship missile defence for the NATO Response Force and NATO national units. (U.S. Navy photo by Lt. Joelle Hoeksma, Royal Netherlands Navy)