> how common was it to build your own shelter in the US? I think this was something that peaked in the '50s. Certainly not at all popular afterward. And the p

> how common was it to build your own shelter in the US? I think this was something that peaked in the '50s. Certainly not at all popular afterward. And the practical problems are colossal. E.g. take New York City. A few buildings had fallout shelters. But, realistically, how do you provide food, water, and sanitation for 8 million people? It's laughable to think that a handful of shelters can accomplish that. And the population of the NYC metropolitan area is much greater, 20 million people, and it would probably be targeted by multiple nuclear warheads. How many could survive, and for how long? Overall, shelters might be a feasible idea for rural "flyover country". They are absurd for the big cities where the majority of the US population lives.