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The first atomic bomb, known as Little Boy, was dropped on Hiroshima on August 6, 1945. It was followed three days later by a second bomb, known as Fat Man , over Nagasaki . The deployment of these bombs led to an estimated 200,000 civilians dead and, debatably, Japan's eventual surrender.
Shuntaro Hida (肥田舜太郎, Hida Shuntaro, born 1 January 1917 – 20 March 2017) was a Japanese physician who was an eyewitness when the Little Boy atomic bomb was dropped on Hiroshima by the Enola Gay on 6 August 1945. He treated survivors as a medical doctor and wrote about the effects of radiation on the human body.
The Atomic Bomb Casualty Commission (ABCC) (Japanese:原爆傷害調査委員会, Genbakushōgaichōsaiinkai) was a commission established in 1946 in accordance with a presidential directive from Harry S. Truman to the National Academy of Sciences-National Research Council to conduct investigations of the late effects of radiation among the atomic-bomb survivors in Hiroshima and Nagasaki. [1]
Theodore Hall was a spy who had worked on the development of the plutonium bomb the US dropped in Japan. [17] Hall provided the specifications of the bomb dropped on Nagasaki. This information allowed the Soviet scientists a first-hand look at the setup of a successful atomic weapon built by the Manhattan Project.
Fat Man was the second nuclear weapon to be deployed in combat after the US dropped a 5-ton atomic bomb, called "Little Boy," on the Japanese city of Hiroshima.
Mar. 16—The Manhattan Project in New Mexico was front and center in 1945. In nanoseconds, the bombing of Hiroshima and Nagasaki in Japan at the end of World War II changed the nature of warfare ...
[30] [31] The prosecution's primary witness, David Greenglass, said that he turned over to Julius a sketch of the cross-section of an implosion-type atom bomb. This was the "Fat Man" bomb dropped on Nagasaki, Japan, as opposed to a bomb with the "gun method" triggering device used in the "Little Boy" bomb dropped on Hiroshima. [32]
Reports by the Manhattan Project in 1946 and the U.S. occupation–led Joint Commission for the Investigation of the Atomic Bomb in Japan in 1951 estimated 66,000 dead and 69,000 injured, and 64,500 dead and 72,000 injured, respectively, while Japanese-led reconsiderations of the death toll in the 1970s estimated 140,000 dead in Hiroshima by ...