U.S. Air Force and Air National Guard civil engineers

U.S. Air Force and Air National Guard civil engineers install a mobile aircraft arresting system during a field training exercise for United States Air Forces Europe Silver Flag 2017 at Ramstein Air Base, Germany, June 10, 2017. The intensive eight-day course involved 155 students from 13 Air National Guard and active-duty civil engineer units. The classroom and hands-on instruction from subject matter experts at the 435th Construction and Training Squadron, prepared the Airmen to work in a joint expeditionary environment setting up a bare base in a hostile forward operating location. The culmination of Silver Flag 2017 was a field training exercise complete with mock explosions, simulated chemical spills, damaged airfields, multiple fires, a suicide bomber and other scenarios based on experiences of military engineers in deployed locations. (U.S. Air National Guard photo by Senior Master Sgt. Roger Parsons)