U.S. Air Force Staff Sgt. Jonathon Harris, 1st Maintenance Squadron Precision Measurement Equipment Laboratory craftsman, inspects fluids for contamination at Langley Air Force Base, Va., Sept. 23, 2014. The ultraviolet light exposes contaminations in fluids and pressure gauges, preventing explosions caused by body oils or dusts. (U.S. Air Force photo by Airman 1st Class Breonna Veal)