U.S. Air Force Senior Airman Mark School, 820th Rapid Engineer Deployable Heavy Operational Repair Squadron Engineer electrician from Nellis Air Force Base, Nev., locates buried electrical lines at Langley Air Force Base, Va., July 18, 2014. REDHORSE squadrons provide heavy-repair capability and construction support when requirements exceed normal base civil engineer squadron capabilities. (U.S. Air Force photo by Airman 1st Class Areca T. Wilson/Released)

U.S. Air Force Staff Sgt. Andrew Goodrick, 820th Rapid Engineer Deployable Heavy Operational Repair Squadron Engineer electrician from Nellis Air Force Base, Nev., takes hold of a part to an electric core drill while performing construction at Langley Air Force Base, Va., July 22, 2014. The visiting REDHORSE electricians are working to repair old electrical circuits by replacing underground infrastructure. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

U.S. Air Force Staff Sgt. Steven Land tightens a water hose connection as Staff Sgt. Andrew Goodrick watches at Langley Air Force Base, Va., July 22, 2014. The 820th Rapid Engineer Deployable Heavy Operational Repair Squadron Engineer electricians from Nellis Air Force Base, Nev., are trenching electric lines and installing pole foundations at Eagle Park. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

U.S. Air Force Staff Sgt. Andrew Goodrick, left, and Senior Airman Paul Dowdell, both 820th Rapid Engineer Deployable Heavy Operational Repair Squadron Engineer electricians from Nellis Air Force Base, Nev., transfer a generator from one side of a ravine to another at Langley Air Force Base, Va., July 22, 2014. REDHORSE engineers provide heavy-repair capability and construction support when requirements exceed normal base civil engineer squadron capabilities. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

A U.S. Air Force Airman assigned to the 820th Rapid Engineer Deployable Heavy Operational Repair Squadron Engineer electricians from Nellis Air Force Base, Nev., troubleshoots an electric core drill power switch at Langley Air Force Base, Va., July 22, 2014. The visiting REDHORSE electricians are working to install new light poles at Eagle Park. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

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)