History: Air observer learning the basic rules how to use a K-3B aerial camera, 1943 (Photo: Dmitri Kessel) [1080x1350]

https://i.redd.it/pxq797ctpgt31.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/dk16j3/air_observer_learning_the_basic_rules_how_to_use/?utm_source=ifttt