Officers at the anti-aircraft gun school at Fortress Monroe, Virginia, practice using a universal sight that moves in all directions. Lt. William Fox, a signal officer, is pictured in this photo taken in April 1918. This photograph is classified as not for publication and for official use only.

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Size: 9177px × 6297px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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