U.S. Air Force Senior Airman Ralph Torres, 820th Rapid Engineer Deployable Heavy Operational Repair Squadron Engineer electrician, spots Staff Sgt. Jerrell Washington, 820th REDHORSE electrician, whiles he digs a trench at Langley Air Force Base, Va., July 18, 2014. REDHORSE units activated in 1966 when Secretary of Defense Robert McNamara asked the Air Force to develop its own combat construction team. The 820th REDHORSE is based at Nellis Air Force Base, Nev. (U.S. Air Force photo by Airman 1st Class Areca T. Wilson/Released)