Participants patch part of a mock runway with a Flowable compound prior to filling with quick setting concrete during Rapid Airfield Damage Recovery training at Ali Al Salem Air Base, Kuwait, Feb. 20, 2020. The RADR training allowed 386th Expeditionary Civil Engineer Squadron Airmen and engineers from Special Purpose Marine Air-Ground Task Force to understand the process and become more familiar with the equipment. (U.S. Air Force photo By Senior Airman Isaiah J. Soliz)