Polish soldiers compete against other nations in a relay race with tank-related objects Grafenwoehr, Germany, May 12, 2017. The Strong Europe Tank Challenge is co-hosted by U.S. Army Europe and the German army, May 7-12, 2017. The competition is designed to project a dynamic presence, foster military partnership, promote interoperability, and provides an environment for sharing tactics, techniques and procedures. Platoons from six NATO and partner nations are in the competition. Army photo by Staff Sgt. Kathleen V. Polanco