Air Force Airman 1st Class Alexander Choi, 51st Security Forces Squadron turret gunner, test fires several blank rounds from an M240 machine gun during a field training exercise at Osan Air Base, Republic of Korea, March 23, 2017. The field training exercise was one of the final parts of the 51st SFS Combat Readiness Course, where Defenders spend 10 days expanding their knowledge on defending the base, executing contingency operations and sustaining the force.

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Photo credit: © Chuck Little / Alamy / Afripics
License: Licensed
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Keywords: air, america, archive, armed, army, cops, defence, defenders, dog, force, forces, korea, military, mwd, navy, osan, reportage, security, service, serviceman, servicemen, sfs, soldier, states, trianing, united, usa, working