Air Force Master Sgt. Mark Crider, 25th Aircraft Maintenance Unit production superintendent, radios in the number of simulated casualties during a no-notice exercise at Osan Air Base, Republic of Korea, May 5, 2017. Wing Inspection Teams from various units tested how well personnel responded and operated during a surprise attack with little time for preparation.

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Photo credit: © David Wa / Alamy / Afripics
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