U.S. Air Force Senior Airman Lincoln Caldwell, 509th Healthcare Operations Squadron medical technician, and U.S. Air Force Tech. Sgt. Justin Wanamaker, 509th Security Forces Squadron defender, provide first aid to a simulated casualty during an active shooter exercise at the Royal Oaks Golf Course, Whiteman Air Force Base, Missouri, May 19, 2021. Moulage was applied to simulated victims to accurately illustrate injuries and add realism to the exercise. (U.S. Air Force photo by Senior Airman Parker J. McCauley)