180322-Z-DI861-0783
Airmen from the 379th Air Expeditionary Security Forces Squadron prepare to infiltrate a building during an attack notification response exercise at Al Udeid Air Base, Qatar, March 22, 2018. The scenario, commenced in a realistic and unanticipated manner, was designed to improve physical and procedural security as well as warning and alert notification capabilities. (U.S. Air Force photo by Staff Sgt. Joshua Horton)