A hydraulic excavator operated by military engineers from the 841st Engineer Battalion, U.S. Army Reserve moves rock near a road under construction on July 6, 2016 at Novo Selo Training Area, Bulgaria during Operation Resolute Castle 2016. Soldiers from the 841st Engineer Battalion spent the summer of 2016 working with service members from the Tennessee Army National Guard and Mississippi Army National Guard to improve a tank training range and ammunition holding area in Bulgaria. (U.S. Army photo by Capt. Kimberlee Lewis, 841st Engineer Battalion, U.S. Army Reserve)