Aug. 31, 2021 Prime BEEF training keep 21st CES primed for action The 21st Civil Engineer Squadron Airmen participated in Prime Base Engineer Emergency Force (BEEF) training at Peterson Space Force Base, Colorado, Aug. 26, 2021.
May 23, 2017 Prime BEEF Day: 21st CES conducts a beddown exercise for monthly training Approximately 100 21st Civil Engineer Squadron Airmen came together for their monthly training, or Prime Base Engineer Emergency Force day, May 18, at Peterson Air Force Base, Colorado.