U.S. 316th Security Forces Group Airmen are briefed during a walkthrough of Imagine Andrews Public Charter School as part of active shooter training at Joint Base Andrews, Md., Nov. 7, 2023. The training gave the base's Defenders a better understanding of the school’s layout to increase readiness during an emergency. (U.S. Air Force photo by Airman 1st Class Gianluca Ciccopiedi)