Staff Sgt. Dustin Snyder, 28th Civil Engineer Squadron hazardous material custodian, directs the dumping of the base course, a soil support layer, as part of a renovations project for the Holbrook Library at Ellsworth Air Force Base, S.D., June 16, 2016. In addition to new sidewalks, the library will also be getting a new patio built for its patrons to enjoy during their visits. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)