Senior Airman Caleb Houser, 366th Security Forces Squadron armorer, makes sight corrections on his weapon before the next phase of firing during the Air Combat Command qualification test for the Defender Challenge 2018 June 30, 2018, at Mountain Home Air Force Base, Idaho. The Defender Challenge raises morale among Security Forces Airmen by encouraging friendly competition.

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Size: 1673px × 1195px
Photo credit: © Barney Low / Alamy / Afripics
License: Licensed
Model Released: No

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