A 52-year-old man from Michigan was put to death with nitrogen gas for the rape and murder of a women in 1991 in Alabama.

Rocco Candela: This is the M50 gas mask right here. This is the newer version. This is much lighter, better. You have your drinking tube. So, you're gonna put this into your canteen. There's a ...

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Now put your books down…and get your gas masks out. Quietly. Now take them carefully out of their boxes - no, no, Isobel, don't drag at it…you show her how to do it, Margaret, will you.

recruits are briefed on the components of the gas mask, how to properly put it on, and how to clear it. Instructor: Get shoulder-to-shoulder! Narrator: We were not allowed to film inside the gas ...