History: U.S. Army soldiers wear gas masks during a chemical warfare training exercise in California, 1943 [1200 x 826]

https://i.redd.it/cshu2d6jq9451.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/h0xqjj/us_army_soldiers_wear_gas_masks_during_a_chemical/?utm_source=ifttt