Airmen and their spouses and family members watch as Airmen of the 28th Civil Engineer Squadron fire department put out a simulated aircraft fire during Spouse Appreciation Day at Ellsworth Air Force Base, S.D., May 6, 2011. The 28th CES provides the necessary assets and skilled personnel to prepare and sustain installations throughout the world. (U.S. Air Force photo/Staff Sgt. Marc I. Lane)