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The original was posted on /r/todayilearned by /u/Super_Goomba64 on 2025-03-13 00:33:05+00:00.

Original Title: TIL that the Hindenburg (which was filled with flammable hydrogen gas) had a smoking lounge. The entrance to the lounge was pressurized, and the bartender had to make sure no hydrogen gas leaked, or if someone walked with a lit pipe or lit cigarette