A U.S. Soldier with 617th Engineer Company, 864th Engineer Battalion, 555th Engineer Brigade, operates an excavator to fill Hesco barriers with dirt to improve a section of the Khost-Gardez Road that was washed out due to heavy rains several weeks earlier in Khost province, Afghanistan, Aug. 28, 2013. (U.S. Army photo by Sgt. Joshua B. Dwyer/Released)