Less than 3 years from generating a half of watt of power in the Chicago pile in December of 1942 to blowing up a city; 4 if you count the previous year. Nobod

Less than 3 years from generating a half of watt of power in the Chicago pile in December of 1942 to blowing up a city; 4 if you count the previous year. Nobody said, "give us 20 years and we'll make you an a-bomb." They pretty much knew how to at least figure out all the lacunae in 3 years.