British soldiers belonging to the Coldstream Guard dismount a UH-60 Black Hawk helicopter assigned to the 4-3 Assault Helicopter Battalion as they prepare to advance toward their objective while participating in a multinational combined arms demonstration alongside troopers assigned to 2nd Squadron, 2nd Cavalry Regiment and Romanian Land Forces during an Exercise Wind Spring distinguished visitors' event at Smardan Training Area, Romania, April 18, 2015. The purpose of the event was to demonstrate interoperability between NATO allies, while also allowing members of the Romanian government, along with British military leadership, to watch as the units worked and trained together in support of Operation Atlantic Resolve-South. (U.S. Army photo by Sgt. William A. Tanner/released)