Airman 1st Class Shawn Jefferds, 28th Civil Engineer Squadron emergency management apprentice, smiles for a photo during the Prime Base Engineer Emergency Force Challenge at Ellsworth Air Force Base, S.D., Sept. 21, 2022. Prime BEEF is an annual challenge that tests the physical and mental strength of engineers. This challenge prepares engineers for any emergencies or deployments, as they are the first and last people out of deployed environments. (U.S. Air Force photo by Airman Yendi Borjas)
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