Airmen from the 2nd Security Forces Squadron, tactically move down a hallway during an active shooter exercise on Barksdale Air Force Base, La., Oct. 26, 2014. Once the primary threat is removed, Airmen perform a hallway and room check to verify no secondary threats are present. (U.S. Air Force photo/Airman 1st Class Mozer O. Da Cunha)
Staff Sgt. Tommy Lester, 2nd Security Forces Squadron emergency response team member, provides cover during an active shooter exercise on Barksdale Air Force Base, La., Oct. 26, 2014. Lester provides cover and overwatch giving other members of his team the capability to move safely in the room. (U.S. Air Force photo/Airman 1st Class Mozer O. Da Cunha)
Airman 1st Class Sage Taylor, 2nd Security Forces Squadron installation patrolman, searches a simulated suspect during an active shooter exercise on Barksdale Air Force Base, La., Oct. 26, 2014. Searches are performed to verify that suspects do not have any tools that can harm personnel during transport. (U.S. Air Force photo/Airman 1st Class Mozer O. Da Cunha)
Senior Airman Mark Witt, 2nd Security Forces Squadron installation patrolman, performs self-aid buddy care on a simulated victim during an active shooter exercise on Barksdale Air Force Base, La., Oct. 26, 2014. Personnel perform SABC on victims with severe injuries prior to removing them from a scene. (U.S. Air Force photo/Airman 1st Class Mozer O. Da Cunha)
Tech. Sgt. Jeffrey Lucas, 2nd Security Forces Squadron installation patrolman, assists a simulated victim during an active shooter exercise on Barksdale Air Force Base, La., Oct. 26, 2014. Once the initial threat is removed, security forces perform a sweep looking for any injured individuals and move them to a safe location for treatment. (U.S. Air Force photo/Airman 1st Class Mozer O. Da Cunha)
Staff Sgt. Jacob Symmonds, 2nd Security Forces Squadron installation patrolman, guards a simulated cordon during an active shooter exercise on Barksdale Air Force Base, La., Oct. 26, 2014. If the threat of an improvised explosive device is present, law enforcement agencies will set up a cordon to keep personnel and traffic away from the blast area. (U.S. Air Force photo/Airman 1st Class Mozer O. Da Cunha)
Maj. David Watts, 2nd Security Forces Squadron commander, debriefs Airmen during an active shooter exercise on Barksdale Air Force Base, La., Oct. 26, 2014. Watts congratulated Airmen on the effective use of tactics and speedy response making this a successful exercise. (U.S. Air Force photo/Airman 1st Class Mozer O. Da Cunha)