Firefighters from the 51st Civil Engineer Squadron finish buddy checks ensuring proper wear of their safety equipment prior to performing a secondary sweep of a simulated building fire during Vigilant Ace 16 at Osan Air Base, Republic of Korea, Nov. 3, 2015. The exercise tests the linkage between operational-level planners and tactical units, to include increased ROK air force participation. ( Air Force photo/Staff Sgt. Amber Grimm)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 16, ace, vigilant