Osan kicks off exercise with active shooter scenario

A 51st Security Forces Squadron military working dog scours a building with its trainer during active shooter exercise at Osan Air Base, Republic of Korea, May 6, 2016.  Osan’s defenders neutralized the simulated active shooter minutes after they entered the building. The scenario officially kicked off the week-long readiness exercise, Beverly Herd 16-01. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)

A 51st Security Forces Squadron military working dog scours a building with its trainer during active shooter exercise at Osan Air Base, Republic of Korea, May 6, 2016. Osan’s defenders neutralized the simulated active shooter minutes after they entered the building. The scenario officially kicked off the week-long readiness exercise, Beverly Herd 16-01. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)

Staff Sgt. Patrick Formiller, 51st Security Forces Squadron first responder, marks simulated evidence with a glow stick during an active shooter exercise at Osan Air Base, Republic of Korea, May 6, 2016. Osan’s defenders responded to test their ability to neutralize an active shooter. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)

Staff Sgt. Patrick Formiller, 51st Security Forces Squadron first responder, marks simulated evidence with a glow stick during an active shooter exercise at Osan Air Base, Republic of Korea, May 6, 2016. Osan’s defenders responded to test their ability to neutralize an active shooter. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)

Staff Sgt. Kyle Hart, 51st Security Forces Squadron patrolman, searches for simulated victims during an active shooter exercise at Osan Air Base, Republic of Korea, May 6, 2016. The scenario kicked off the week-long readiness exercise, Beverly Herd 16-01. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)

Staff Sgt. Kyle Hart, 51st Security Forces Squadron patrolman, searches for simulated victims during an active shooter exercise at Osan Air Base, Republic of Korea, May 6, 2016. The scenario kicked off the week-long readiness exercise, Beverly Herd 16-01. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)

OSAN AIR BASE, Republic of Korea -- A 51st Security Forces Squadron military working dog scours a building with its trainer during active shooter exercise at Osan Air Base, Republic of Korea, May 6, 2016. Osan’s defenders neutralized the simulated active shooter minutes after they entered the building. The scenario officially kicked off the week-long readiness exercise, Beverly Herd 16-01. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)