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The Manhattan Project: Ending the Pacific War with the A-Bomb

Explore the US plan to end the Pacific War by developing the atomic bomb. Started in 1939 by the Germans, FDR authorized the secret "Manhattan Project" in 1940. Led by Gen. Leslie R. Groves and physicist J. Robert Oppenheimer, the project aimed to harness the energy of the atom. The first successful test, the Trinity Test, occurred on 07/16/45. The bombings of Hiroshima and Nagasaki followed in August 1945, leading to Japan's surrender on August 14th. Learn about the pros and cons of dropping the atomic bomb and its impact on history.

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The Manhattan Project: Ending the Pacific War with the A-Bomb

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  1. The Manhattan Project What was the US plan for ending the Pacific War?

  2. II. Developing the A-Bomb A. 1939: Germans begin work on atomic bomb (a-bomb) B. 1940: FDR authorizes a secret plan, “Manhattan Project” to build an A-bomb 1. Led by Gen. Leslie R. Groves & physicist J. Robert Oppenheimer & developed at Los Alamos Ntl Lab in New Mexico 2. could release more energy than 20,000 tons of TNT 3. 07/16/45: “Trinity Test”- 1st bomb called “Gadget” was tested (Alamogordo, NM) Trinity Test

  3. For Against Pros & Cons of dropping the Atomic Bomb

  4. 4. Second bomb was named “Little Boy” C. August 6, 1945: B-29 (bombing plane) named the Enola Gay dropped “Little Boy” on the city of Hiroshima, Japan D. Japan doesn’t surrender. Three days later, a B-29 named Bockscar dropped the third bomb named “Fat Man” on Nagasaki, Japan E. Japan surrenders on August 14th, 1945

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