Marines Lance Cpl. Dulon Grant, right, and Lance Cpl. Tristan Allen check corners when entering an open room during an active-shooter, first-responder training on Camp Foster, Okinawa, Japan, Dec. 18, 2018. The training allowed Provost Marshal's Office Marines from across Okinawa to test their partnership and quick thinking abilities under stress. Grant and Allen are military police officers with Headquarters and Support Battalion, Marine Corps Installations Pacific – Marine Corps Base Camp Butler, Japan.

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Photo credit: © Conner Flecks / Alamy / Afripics
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Keywords: -responder, active-shooter, archive, armed, base, camp, corps, defence, forces, foster, marine, marines, mcb, military, okinawa, pmo, reportage, servicemen, training, usa