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- Subject is exactly "United States. Army. Air Corps. Observation Squadron, 116th"
[Lieutenant Wallen piloting Douglas O-38 aircraft]
![[Lieutenant Wallen piloting Douglas O-38 aircraft]](https://digitalcollections.museumofflight.org/files/square_thumbnails/6c76d9391f37e37689a1af19d36d9bc9.jpg "[Lieutenant Wallen piloting Douglas O-38 aircraft]")
Photograph of Lieutenant Wallen piloting a U.S. Army Air Corps Douglas O-38 aircraft, circa 1930s. The "dagger and ace of spades" emblem of the 116th Observation Squadron is painted on the fuselage.Caption: "116 Obs Sqdn / H.D. 10 (7-10-35 pm) / Lt.…