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At the close of World War II, the Soviet Union had special search teams operating in Austria and Germany, especially in Berlin, to identify and obtain equipment, material, intellectual property, and personnel useful to the Soviet atomic bomb project.
Rumors that Germany had an atomic bomb persisted as late as March 1945, [66] but all signs pointed to the lack of a production program. On March 16, Groves wrote to Bissell that "the most complete and factual information we have obtained bearing on the nature of the German effort in our field"— the results of the Strasbourg mission — "tends ...
Harteck said that he would have understood the words "uranium" or "nuclear (fission) bomb", but he had worked with atomic hydrogen and atomic oxygen and thought that American scientists might have succeeded in stabilising a high concentration of (separate) atoms; such a bomb would have had a tenfold increase over a conventional bomb. [10]
The first atomic bombs dropped on Hiroshima and Nagasaki on August 6 and 9, 1945, respectively, were large, custom-made devices, requiring highly trained personnel for their arming and deployment. They could be dropped only from the largest bomber planes—at the time the B-29 Superfortress —and each plane could only carry a single bomb in ...
The discovery of nuclear fission in 1938 made the development of an atomic bomb a theoretical possibility. [52] Fears that a German atomic bomb project would develop atomic weapons first, especially among scientists who were refugees from Nazi Germany and other fascist countries, were expressed in the Einstein–Szilard letter to Roosevelt in 1939.
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 ...
By 2015, the U.S. public was close to evenly split on whether the use of nuclear weapons was justified. Oppenheimer himself was deeply conflicted about the weapons he helped create.
1945 – July 22 – Truman alludes to Stalin about having successfully detonated an atomic bomb at the Potsdam Conference. [18] [6] 1945 – August 6 – "Little Boy", a gun-type uranium-235 weapon, is dropped on Hiroshima, Japan. 1945 – August 9 – "Fat Man", an implosion-type plutonium-239 weapon, is dropped on Nagasaki, Japan.