Cadre members unload material from the back of a

Cadre members unload material from the back of a light-medium tactical vehicle to prepare a range event for Sapper Stakes 2015 at Fort Chaffee, Ark., Aug. 31. Combat engineers use demolition in mobility and counter-mobility to both allow movement to allies and impede movement for enemy forces. The competition is designed to build teamwork, enhance combat engineering skills and promote leadership among the units. (U.S. Army photo by Master Sgt. Michel Sauret)