LUKE AIR FORCE BASE, Ariz. -- Luke Airmen participate in an active shooter exercise Feb. 26, 2021, at Luke Air Force Base, Arizona. The exercise took place at the Bryant Fitness Center, and evaluated the training, readiness and capability of Luke Airmen to respond to an active shooter threat. Exercises ensure Airmen meet warfighting needs with a continuous drive toward more effective and efficient training. (U.S. Air Force photos by Staff Sgt. Amber Carter)