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Aerial view of a German gas attack, opening of gas containers, World War I (1916)

(Source: Deutsches Bundesarchiv [German Federal Archives]. Attribution: Bundesarchiv, Bild 183-F0313-0208-007 / CC-BY-SA 3.0. Creative Commons Attribution-Share Alike 3.0 Germany License, https://creativecommons.org/licenses/by-sa/3.0/de/deed.en. Photograph edited by Dr. Douglas J Lanska.)

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