Ellsworth Air Force Base, S.D. --   Mr. Nicholas Fontaine, 28th Civil Engineer Squadron fireman, and U.S. Army guardsman, assigned to the 109th Engineer Battalion, extinguish a fire during a structural fire exercise at Ellsworth Air Force Base, South Dakota, June 13, 2023. Ellsworth firemen train with various fire departments around the area, to include: Pennington County, Rapid City, Box Elder, Rapid Valley, South Dakota Army Guard and Nebraska Army Guard. (U.S. Air Force Photo by Airman 1st Class Yendi Borjas)