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 ...

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.