U.S. Soldiers of Regimental Engineer Squadron, 2nd Cavalry Regiment use a D7R-II bulldozer to dig tank trenches while constructing defensive obstacles during exercise Saber Junction 15 at the U.S. Army’s Joint Multinational Readiness Center in Hohenfels, Germany, April 14, 2015. Saber Junction 15 prepares NATO and partner nation forces for offensive, defensive and stability operations, and promotes interoperability among participants. Saber Junction 15 has more than 4,700 participants from 17 countries, to include: Albania, Armenia, Belgium, Bosnia, Bulgaria, Great Britain, Hungary, Latvia, Lithuania, Luxembourg, Macedonia, Moldova, Poland, Romania, Sweden, Turkey and the U.S. (U.S. Army photo by Spc. Tyler Kingsbury/Released)