Keeping Shaw cool with water, fuel systems
U.S. Air Force Senior Airman Rafael Agosto, 20th Civil Engineer Squadron water and fuel systems maintenance journeyman, tests a backflow device at Shaw Air Force Base, S.C., June 9, 2016. Backflow devices, which prevent contamination of the main water supply by only allowing water flow in one direction, are tested annually for proper function. (U.S. Air Force photo by Airman 1st Class Destinee Dougherty)