U.S. Army 2nd Lt. Preston Button, left, with the 500th

U.S. Army 2nd Lt. Preston Button, left, with the 500th Engineer Company, 15th Engineer Battalion, 18th Engineer Brigade, listens to advice from Staff Sgt. Michael Santurri, an observer-controller, after Soldiers with the company came into contact with simulated opposition forces played by Soldiers with the 1st Battalion, 4th Infantry Regiment during a convoy at the 7th Army Joint Multinational Training Command's Hohenfels Training Area in Hohenfels, Germany, Sept. 4, 2014, during exercise Saber Junction 2014. Saber Junction is a U.S. Army Europe-led exercise designed to prepare U.S., NATO and international partner forces for unified land operations. (U.S. Army photo by Sgt. Christina M. Dion/Released)