Travis medical staff tend to simulated victims during an active-shooter exercise Nov. 18, 2014, at Travis Air Force Base, California. Simulated victims were added to the scenario to create a sense of realism. The base wide scenario was played out in realistic, gritty detail, all in an effort to prepare emergency personnel and all Travis AFB employees for a potential crisis. (U.S. Air Force photo by Heide Couch)
Travis medical staff tend to simulated victims during an active-shooter exercise Nov. 18, 2014, at Travis Air Force Base, California. Simulated victims were added to the scenario to create a sense of realism. The base wide scenario was played out in realistic, gritty detail, all in an effort to prepare emergency personnel and all Travis AFB employees for a potential crisis. (U.S. Air Force Photograph/Heide Couch)
Airmen from the 60th Security Forces Squadron enter a vacant building simulating an active-shooter scenario Nov. 18, 2014, at Travis Air Force Base, California. The Airmen effectively neutralized the shooter and secured the facility. To ensure safety during the exercise, the Airmen traded their real firearms for training weapons. Travis routinely conducts emergency exercises to prepare the base for possible threats, natural disasters and accidents. (U.S. Air Force photo by Heide Couch)
Airmen from the 60th Security Forces Squadron respond to an active-shooter exercise Nov. 18, 2014, at Travis Air Force Base, California. Travis members tested their preparedness during a simulated active-shooter exercise at vacant Bldg. 235. The base wide scenario was played out in a realistic, gritty detail, all in effort to prepare emergency personnel and all Travis employees for a potential crisis. (U.S. Air Force photo by Heide Couch)
An Airman from the 60th Security Forces Squadron enters a vacant building during a simulated active-shooter scenario Nov. 18, 2014, at Travis Air Force Base, California. The Airmen effectively neutralized the shooter and secured the facility. To ensure safety during the exercise, the Airmen traded their real firearms for training weapons. Travis routinely conducts emergency exercises to prepare the base for possible threats, natural disasters and accidents. (U.S. Air Force photo by Heide Couch)
Airmen from the 60th Security Forces Squadron assess simulated victims that had been wounded during an active-shooter exercise Nov. 18, 2014, at Travis Air Force Base, California. The wounded received a card indicating their injuries with descriptions and their vital signs to advise medical responders how to treat each "victim." (U.S. Air Force photo by Heide Couch)
Travis Explosive Ordnance Disposal specialists prepare to evaluate a possible incendiary device that was left in an abandoned building during a base wide exercise Nov. 18, 2014, at Travis Air Force Base, California. The base wide scenario was played out in realistic, gritty detail, all in an effort to prepare emergency personnel and all Travis AFB employees for a potential crisis. (U.S. Air Force photo by Heide Couch)
Travis emergency room personnel try to locate an area on a map of the installation during an active-shooter exercise Nov. 18, 2014, at Travis Air Force Base, California. The active-shooter exercise evaluated base first responders abilities to manage a mass casualty incident. (U.S. Air Force photo by T.C. Perkins Jr.)
Airmen from the 60th Medical Group examine a simulated victim during an active-shooter exercise Nov. 18, 2014, at Travis Air Force Base, California. (U.S. Air Force photo by T.C. Perkins Jr.)
Airmen from the 60th Medical Group transport a simulated victim during an active-shooter exercise Nov. 18, 2014, at Travis Air Force Base, California. (U.S. Air Force photo by T.C. Perkins Jr.)