First responders tend to simulated injured personnel during an active shooter exercise at Joint Base Langley-Eustis, Virginia, Nov. 8, 2022. Simulating a crisis can be used to help evaluate the response of organizations such as security forces, fire and emergency services, the Air Force Office of Special Investigations and the Army Criminal Investigation Division, the medical response team and public affairs. (U.S. Air Force photo by Staff Sgt. Anthony Nin Leclerec)