U.S. Army Spc. Lucas Johnson, left, an infantryman with Eagle Troop, 2nd Squadron, 2nd Cavalry Regiment, stationed at Vilseck, Germany, suppresses a simulated enemy with an M240B machine gun during Exercise Spring Storm in Voru, Estonia, May 14, 2016.
Exercise Spring Storm was an annual Estonian Army Land Defense Forces training exercise that included nearly 6,000 military personnel from the United States, Finland, Germany, Latvia, Lithuania, the Netherlands, the United Kingdom and Canada. (U.S. Army photo by Staff Sgt. Steven M. Colvin). Original public domain image from Flickr