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Aim: Was the US justified in dropping the atomic bomb on Japan?

Aim: Was the US justified in dropping the atomic bomb on Japan?. The Father of the Atomic Bomb: J. Robert Oppenheimer. Oppenheimer supervised the Manhattan Project to build an atomic bomb “Oppy” had deep reservations about the use of atomic weapons

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Aim: Was the US justified in dropping the atomic bomb on Japan?

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  1. Aim: Was the US justified in dropping the atomic bomb on Japan?

  2. The Father of the Atomic Bomb: J. Robert Oppenheimer • Oppenheimer supervised the Manhattan Project to build an atomic bomb • “Oppy” had deep reservations about the use of atomic weapons • Upon witnessing the first atomic explosion, he quoted text from the Bhagavad Gita, “Now I am become death, the destroyer of worlds.”

  3. Why Drop the Atomic bomb? • Bring about the immediate surrender of Japan • Save American lives that would be lost in an invasion of Japan • Deploy an asset that was meant to be used (bureaucratic momentum) • Display American power • Obviate the need for a Soviet invasion of Japan--no power-sharing in Japan

  4. President Truman’s Warning • "Let there be no mistake, we shall completely destroy Japan's power to make war. If they do not now accept our terms [unconditional surrender], they may expect a rain of ruin from the air the like of which has never been seen on this earth."

  5. Hiroshima after the blast

  6. Near the epicenter of the Hiroshima blast The shadow of an incinerated person

  7. Hiroshima: The Results • Roughly 70,000 people died in the immediate atomic blast, including about 20 American POWS held in the city. • By the end of 1945, around 30,000 more people died from the lingering effects of the bombing. • The 5-year death total may have reached or exceeded 200,000 people, as cancer and other long-term effects took hold.

  8. The Nagasaki Bombing: 3 days after Hiroshima • The original mission was to bomb the Japanese city of Kokura. • Poor weather caused the US to move its mission to Nagasaki. • Nagasaki was an industrial center and a major port with approximately 200,000 residents.

  9. Nagasaki: The Results • The initial blast probably killed 40,000 people, with 60,000 more injured • 6 months later, another 10,000 people had died. • The day after this bombing, the emperor of Japan offered his country’s surrender. • World War II ended.

  10. The Post-WWII Arms Race • The use of the atomic bombs caused an arms race between the USA and the USSR. • The chart to the right is a depiction of the number of US nuclear weapons (by year) capable of being used after WWII

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