From left, Tech. Sgt. Mardi Wilson watches as Airman 1st Class Eric Johnson, both 919th Special Operations CIvil Engineer Squadron pavement and heavy construction equipment specialists, pours dirt out of the bulldozer and into a truck, Jan. 11, 2019, Duke Field, Fla. To complete the training requirements Johnson has to be proficient at operating both vehicles. (U.S. Air Force photo by Senior Airman Dylan Gentile)