The eighth-mile running track allows Airmen and dependents to work out in a temperature-controlled environment at the Warrior Fitness Center April 12, 2012, at Nellis Air Force Base, Nev. Specially coated windows in the Warrior Fitness Center block ultraviolet rays in sunlight from entering the gym and creating excess heat, greatly reducing the energy needed for cooling. The gym's windows are placed so that they receive the least possible amount of direct UV rays, while special exterior facing materials and insulation passively cool the building without using additional energy. (U.S. Air Force photo by Staff Sgt. Christopher Hubenthal)
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