A U.S. Army Stryker armored vehicle of 4th Squadron, 2nd Cavalry Regiment provides security during exercise Allied Spirit I at the Joint Multinational Readiness Center in Hohenfels, Germany, Jan. 20, 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)