DEW Line

Watching for Nuclear Attack at the Top of the World
The DEW Line has always been around, at least in my lifetime. I had always heard about it, but I never got an idea of the scale, probably because it was classified, or somebody decided that no one was interested. This is the second time I've posted one of Tom Scott's videos (first time here). He doesn't dig very deep, but he does give a good overview of WTF has been going on in some very obscure places.