The Zim-Mixer volumetric concrete mixer sits on the flight line at Horsham Air Guard Station, Pa., Aug. 14, 2016. The device holds each element of concrete in separate sections and aggregates them as needed which reduces the amount of wasted material. To improve their knowledge of the equipment, the “Dirt Boys” used the mixer to lay a concrete slab in their training area. (U.S. Air National Guard photo by Senior Airman Timi Jones)