2nd Lt. Tryston Clark, 366th Security Forces Squadron, adjusts his helmet strap before firing his weapon during the Air Combat Command qualification test for the Defender Challenge 2018 June 30, 2018, at Mountain Home Air Force Base, Idaho. This will be the first Defender Challenge held by the Air Force in 14 years.

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Size: 1581px × 1265px
Photo credit: © Barney Low / Alamy / Afripics
License: Licensed
Model Released: No

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