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It hadn't in the Eighties. If you want to be a nuclear war planner, I suggest Nukemap. https://nuclearsecrecy.com/nukemap/ https://nuclearsecrecy.com/nukemap/ No more plastic wheels to spin like a sliderule. Want to take out a target? What's your weapon system's CEP (Circle of Equal Probability)? How is the target built, that is, how much overpressure to destroy it, and how deeply buried is it? Now choose a weapon. If it'a high-priority target, aim more than one weapon at it.