U.S. Air Force Airman 1st Class Amber Ubinger, 20th

U.S. Air Force Airman 1st Class Amber Ubinger, 20th Aerospace Medical Squadron bio-environmental technician, pours a revealing agent into a water sample for testing at Shaw Air Force Base, S.C., Aug. 17, 2012. When incubated, the revealing agent may turn different colors, indicating whether or not there is contamination present within the sample. This is one of many tests used to ensure Shaw’s water is safe for use and consumption.