Sgt. 1st Cl. Perrain, Chief Instructor of Aerial Gunnery, teaching soldiers how to estimate distances in the air during practice on ranging at the Aerial Gunnery School, 2nd Tours, Indre et Loire, France. Photo taken on November 3, 1918, by Pvt. Clyde L. Eddy.

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Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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