You've obviously never heard of cobalt thorium G.
Cobalt thorium G has a radioactive halflife of ninety three years. If you take, say, fifty H-bombs in the hundred megaton range and jacket them with cobalt thorium G, when they are exploded they will produce a doomsday shroud. A lethal cloud of radioactivity which will encircle the earth for ninety three years!
At the bottom of our deepest mineshaft we would be safe from the radiation.
It would not be difficult mein Fuhrer! Nuclear reactors could, heh... I'm sorry. Mr. President. Nuclear reactors could provide power almost indefinitely. Greenhouses could maintain plantlife. Animals could be bred and slaughtered. A quick survey would have to be made of all the available mine sites in the country. But I would guess... that ah, dwelling space for several hundred thousands of our people could easily be provided.
Of course it would be absolutely vital that our top government and military men be included to foster and impart the required principles of leadership and tradition.
Naturally, they would breed prodigiously, eh? There would be much time, and little to do. But ah with the proper breeding techniques and a ratio of say, ten females to each male, I would guess that they could then work their way back to the present gross national product within say, twenty years.
But it is, you know, a sacrifice required for the future of the human race. I hasten to add that since each man will be required to do prodigious... service along these lines, the women will have to be selected for their sexual characteristics which will have to be of a highly stimulating nature.
I love that movie.