Louisiana plans to use nitrogen gas to execute death row inmate Jessie Hoffman next week. Here's what to know about the ...

Louisiana's protocol says death row inmates will be forced to breathe pure nitrogen through a respirator mask for 15 minutes or for 5 minutes after the inmate's heart rate reaches a flatline on an EKG ...

to experience its effects and to know how to properly use a gas mask. SSgt Antonio Garay: Gas chamber's important because it builds confidence. Confidence in the gear, confidence in the drill ...

Under the protocol, the subject is strapped to a gurney, forced to breathe pure nitrogen gas through a mask placed on their face, depriving them of oxygen.

More than 40 million gas masks were issued. In America there was a gas mask for children that looked like Mickey Mouse, with the character's nose and ears and even a picture of him on the gas filter.

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.