When I read that, I assumed it has something to do with the school mascot.
Under the desk was for earthquakes.
Basement, crouched with your coat over your head was for A-bombs.
This anon still remembers.
We had cartoons to keep us safe.
As an abused kid, my own family was much scarier than any bomb.
My great-grandfather was a pedo, but he ded now. So it all worked out.
California kids had earthquake drills weekly in the 50's-60's.
Mine went through the whole family, too. He played it smart though. Started with them as babies and stopped when they reached school age. Don't remember anyone ever told or was believed.