The trial balloons recently sent up about protecting our population in the event of nuclear war focus on the staged evacuation of cities— not, as in the early Sixties, on bomb shelters. The aim today is more on countering nuclear threats, less on protecting people or defending the nation. A capability to maneuver people (like troops) is needed to give the president an option to yielding to nuclear blackmail.
This is what is called crisis management, and it has a “logic” of its own. For example, the U.S. would have to be able to move people out of cities, or protect them there, in vastly greater numbers than Russia needs to do simply to make things even. We have far more of our population in far more and far more populous metropolitan areas than has Russia. The president, if he is sensible, is more likely to yield to power-moves under cover of nuclear threats than is Russia. He must blink first. Under such conditions, who now has the more credible deterrent?