A U.S. Army Stryker armored vehicle of Pale Horse Troop, 4th Squadron, 2nd Cavalry Regiment provides security while conducting an overwatch during exercise Allied Spirit at the Joint Multinational Readiness Center in Hohenfels, Germany, Jan. 25, 2015. Exercise Allied Spirit includes more than 2,000 participants from Canada, Hungary, Netherlands, United Kingdom and the U.S. Allied Spirit is exercising tactical interoperability and testing secure communications within alliance members. (U.S. Army photo by Spc. Tyler Kingsbury/Released)