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I suggest reading Richard Rhodes book: The Making of the Atomic Bomb.
Many people were involved; one of the most famous might have been J. Robert Oppenheimer.
The United States in Japan during WW2.
Germany never had an atomic bomb.
The atomic bomb made countries be less eager to go to war. The threat of the bomb was too great, as many lives could be instantly lost in the hands of the wrong people.
no, but they were involved as couriers to leak information on the bomb to the USSR.
I suggest reading Richard Rhodes book: The Making of the Atomic Bomb.
Yes
The atomic bomb is too expensive to develop for a city to have them. They are weapons held only by industrialized countries.
many countries
Oppenheimer was the scientific director of the development of the atom bomb in New Mexico.
yes
There are many different elements involved in the construction of an atomic bomb, but the elements that actually cause an atomic explosion are either uranium (specifically the U235 isotope) or plutonium.
Abraham LincolnTed Turnermost of the US populationetc.
Russia (USSR) declared war on Japan right after the Hiroshima bomb.
The Rosenbergs were involved in the Manhattan Project which designed and made the first atomic bomb. They spied for the Soviet Union and passed the information to the Soviet Union on how to make an atomic bomb. They were caught and were executed for spying. With the breakup of the Soviet Union, the great value of their spying to the Soviet Atomic Bomb program was revealed.
Hiroshima and Nagasaki