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The video, filmed in the United States in 1960, paints an unsettling picture of life in the nuclear age.
It shows a classroom of children, no older than 10, being given a lecture about biohazard masks by a government scientist.
He tells the class that the masks will protect them from "biological and chemical attack by purifying the air inhaled".
The youngsters are then lead into a chamber while the narrator says the mask's "effectiveness" will be tested using a potentially deadly mix of "microbial organisms".