Airmen assigned to the 99th Civil Engineer Squadron’s Prime Base Engineer Emergency Forces, conduct a hydro-excavation during an Agile Combat Employment exercise at Camp Cobra, Nellis Air Force Base, Nev., Nov. 9, 2021. In steps to innovate and modernize the Department of Defense, approximately 200 Airmen assigned to the 99th CES’s Prime BEEF participated in an ACE exercise training multi-capable Airmen. (U.S. Air Force photo by Michael J. Hasenauer)