• If some nuclear properties of the heavy elements had been a little different from what they turned out to be, it might have been impossible to build a bomb.

    Emilio G. Segre: If some nuclear properties of the heavy elements had been a little different from what they turned out to be, it might have been impossible to build a bomb.
    "Enrico Fermi: Physicist". Book by Emilio G. Segre (p. 149), 1970.