In 1982, I was a 1st grader in akron, ohio. we used to have nuclear bomb drills. we'd go to the cafeteria of annunciation-st. john grade school (the basement) and hide under tables, since obviously that could save us from radiation and nuclear blast.
Must have been some remnant of the cold war fear, but that is one of my earliest school memories... having a 23 year old teacher Miss C explaining to us how holding hands over heads on floor would keep a collapsing school from nuclear blast from hurting us lol.
Although kids that young are doing shooter drills these days, so I guess not much changes.