Wayne Kolve, a crew chief assigned to the 28th Civil Engineer Squadron, places a firefighter helmet on a child’s head during a Base Appreciation Day at Ellsworth Air Force Base, S.D., Sept. 16, 2017. The event was hosted in recognition of the U.S. Air Force’s 70th Anniversary, and included static aircraft displays, bouncy castles, display tables from different base agencies and a B-1 bomber high-speed flyover. (U.S. Air Force photo by Senior Airman Denise M. Jenson)