628th Security Forces Squadron members respond to a simulated terrorist attack at Joint Base Charleston - Air Base March 20. During the active shooter scenario, the Anti-Terrorism/Force Protection exercise evaluated JB Charleston's capabilities in responding to a crisis situation. (U.S. Air Force photo/Staff Sgt. Katie Gieratz)

Senior Airman Matthew Baxter secures a building at Joint Base Charleston - Air Base after a simulated attack March 20. During the active shooter scenario, the Anti-Terrorism/Force Protection exercise evaluated JB Charleston's capabilities in responding to a crisis situation. Baxter is a 628th SFS journeyman. (U.S. Air Force photo/Staff Sgt. Katie Gieratz)

Staff Sgt. Vincent Bustillo provides cover for another 628th Security Forces member at Joint Base Charleston - Air Base March 20. During the active shooter scenario, the Anti-Terrorism/Force Protection exercise evaluated JB Charleston's capabilities in responding to a crisis situation. Sgt. Bustillo is a 628th Security Forces Squadron patrolman. (U.S. Air Force photo by Airman 1st Class George Goslin)

Tech. Sgt. Keith Lippy and Staff Sgt. Vincent Bustillo clear rooms during an active shooter scenario at Joint Base Charleston - Air Base March 20. During the active shooter scenario, the Anti-Terrorism/Force Protection exercise evaluated JB Charleston's capabilities in responding to a crisis situation. (U.S. Air Force photo by Airman 1st Class George Goslin)

Tech. Sgt. Keith Lippy checks a body for signs of life during an active shooter scenario at Joint Base Charleston - Air Base March 20. During the active shooter scenario, the Anti-Terrorism/Force Protection exercise evaluated JB Charleston's capabilities in responding to a crisis situation. Sgt. Lippy is a 628th Security Forces Squadron patrolman. (U.S. Air Force photo by Airman 1st Class George Goslin)

Tech. Sgt. Keith Lippy subdues a perpetrator during an active shooter scenario at Joint Base Charleston - Air Base March 20. During the active shooter scenario, the Anti-Terrorism/Force Protection exercise evaluated JB Charleston's capabilities in responding to a crisis situation. Sgt. Lippy is a 628th Security Forces Squadron patrolman. (U.S. Air Force photo by Airman 1st Class George Goslin)

628th Medical Group personnel perform simulated life saving techniques on a volunteer at Joint Base Charleston - Air Base March 20. During the active shooter scenario, the Anti-Terrorism/Force Protection exercise evaluated JB Charleston's capabilities in responding to a crisis situation. (U.S. Air Force photo/Staff Sgt. Katie Gieratz)