Senior Airman Dustin Snyder, 28th Civil Engineer Squadron pavements and construction technician, signals to dump dirt at a main fuel storage tank site on Ellsworth Air Force Base, S.D., Sept. 2, 2015. Preventative measures are taken to confirm there are no leaks or spills, ensuring a clean and healthy environment. (U.S. Air Force photo by Airman Sadie Colbert/Released)