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  2. Atomic bombings of Hiroshima and Nagasaki - Wikipedia

    en.wikipedia.org/wiki/Atomic_bombings_of...

    The atomic bomb explosion generated a windstorm several kilometers wide that carried ash, dust, and debris over the mountain ranges surrounding Nagasaki. Approximately 20 minutes after the bombing, a black rain with the consistency of mud or oil came down carrying radioactive material for one to two hours before turning clear. [227]

  3. History of nuclear weapons - Wikipedia

    en.wikipedia.org/wiki/History_of_nuclear_weapons

    The Joe-1 atomic bomb test by the Soviet Union that took place in August 1949 came earlier than expected by Americans, and over the next several months there was an intense debate within the U.S. government, military, and scientific communities regarding whether to proceed with development of the far more powerful Super. [50]

  4. Little Boy - Wikipedia

    en.wikipedia.org/wiki/Little_Boy

    Little Boy was a type of atomic bomb created by the United States as part of the Manhattan Project during World War II.The name is also often used to describe the specific bomb (L-11) used in the bombing of the Japanese city of Hiroshima by the Boeing B-29 Superfortress Enola Gay on 6 August 1945, making it the first nuclear weapon used in warfare, and the second nuclear explosion in history ...

  5. An unsettling photo of a US physicist cheerfully ... - AOL

    www.aol.com/article/2016/05/16/an-unsettling...

    Weighing 14 pounds and responsible for 80,000 deaths, the heart of the "Fat Man" atomic bomb was detonated on August 9, 1945, over the Japanese city of Nagasaki. Related: Iconic photos from WWII: ...

  6. Nuclear weapon - Wikipedia

    en.wikipedia.org/wiki/Nuclear_weapon

    A nuclear weapon [a] is an explosive device that derives its destructive force from nuclear reactions, either fission (fission or atomic bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter.

  7. Fat Man - Wikipedia

    en.wikipedia.org/wiki/Fat_Man

    Fat Man Replica of the original Fat Man bomb Type Nuclear fission gravity bomb Place of origin United States Production history Designer Los Alamos Laboratory Produced 1945–1949 No. built 120 Specifications Mass 10,300 pounds (4,670 kg) Length 128 inches (3.3 m) Diameter 60 inches (1.5 m) Filling Plutonium Filling weight 6.2 kg Blast yield 21 kt (88 TJ) "Fat Man" (also known as Mark III) was ...

  8. J. Robert Oppenheimer - Wikipedia

    en.wikipedia.org/wiki/J._Robert_Oppenheimer

    The first atomic bomb test by the Soviet Union in August 1949 came earlier than Americans expected, and over the next several months, there was an intense debate within the U.S. government, military, and scientific communities over whether to proceed with the development of the far more powerful, nuclear fusion–based hydrogen bomb, then known ...

  9. Debate over the atomic bombings of Hiroshima and Nagasaki

    en.wikipedia.org/wiki/Debate_over_the_atomic...

    Criticism and debate exist not only regarding the atomic bombings themselves but also concerning the Atomic Bomb Casualty Commission (ABCC), which conducted surveys on the aftermath of the bombings. The Atomic Bomb Casualty Commission (ABCC) was established in 1946 following a presidential directive from Harry S. Truman. The sole purpose of the ...