The bombs spirited into the hundred largest cities of the US/CS

were not radiological, but closer to non-thermobaric vacuum bombs.

 

But the 1950's was a period of scientific leaps and bounds, compliments of thousands of scientists who defected to the US/CS

from Nazi held territories - and the secrets they brought with them.

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Preparing for invasion, the US/CS applied this knowledge as aggressively as possible - building nuclear reactors in dozens of cities,

none of which escaped destruction on D-Day.

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Vaccum Atmosphere.