The atomic bomb was not invented by any country, it was invented in 1933 by Leo Szilard (he was in London at the time, so when he patented the invention he sold it to the British Admiralty who classified it to keep the idea away from the Nazis).However following the discovery in 1939 of fission in uranium-235 by a team working in Germany and Sweden, the atomic bomb was independently reinvented (without any knowledge of Szilard's classified invention) by scientists in almost every industrialized country in the world.However it took the Manhattan Project (a joint U.S., U.K. Canada project) to actually build the massive industrial infrastructure needed to begin building atomic bombs. No other country was even prepared at the time to make this level of investment in such a speculative technolo