Recruits wear this M50 pro mask, which can protect soldiers from lethal chemicals. Rocco Candela: This is the M50 gas mask right here. This is the newer version. This is much lighter, better.

More than 40 million gas masks were issued ... It was also made lighter than normal masks so it was easier to wear. Contributed by John McFarline during the AHOW event at Enniskillen Library.

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.