When I grew up in the 80ies Denmark nuclear “defense” was sort of build into everyday aspects. My childhood school had some really wide hallways with really wide doors. Turns out it was because my suburb was at the right distance from the city mass to be turned into a hospital following a nuclear attack. It also turned out the school had a large underground system full of various medical supplies and a control center of sorts to coordinate the medical leadership.

Cities mandated that housing needed basements which could be turned into nuclear bunkers/shelters. Where my parents live now there is basically a tiny town in the basements. Much of it is now things like fitness centers, tennis courts, a library and a few stores (not groceries or other things you eat/drink). Back in the 80ies it was solely meant for people storage, but after the wall fell it was slowly turned into more useable stuff.

Similarly most of our bunkers are now either discontinued or used for something practical.

I wonder if we’re going to see an increase in “civil defense” again now that we’re in another Cold War.