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WWII Attack! from Pearl Harbor to Potsdam
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00225_Field_225.txt
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44 lines
1940
June 3-German scientists fail to observe neutron multiplication in the reactor in Hamburg.
1941
January-Based on experiments with a natural uranium reactor, the Germans reject graphite as a
moderator.
July-British 'Maud' Committee reports that a weapon could be made with 10 kg of U-235; U.S.
Academy of Sciences endorses bomb program.
1942
May-Heisenberg and Dopel observe the first multiplication of neutrons.
December 2-First nuclear chain reaction at Chicago's Stagg Field by Fermi.
1943
March 15-Oppenheimer moves the bomb development to Los Alamos.
1944
August 26-Bohr presents his memorandum on intentional control of nuclear weapons to
Roosevelt.
November-First batch of spent fuel obtained from Hanford reactors.
November-Goudsmit's ALSOS mission obtains documents which imply that the German's rate
of progress toward a bomb had diminished.
1945
January- First Pu reprocessing production run at Hanford
January 20- First U-235 separated at Oak Ridge.
June 11- The Franck Report was sent to the Secretary of War.
July 16-U.S. explodes first atomic bomb, the Trinity test, at Alamogordo.
August 6,9-Atomic bombs dropped on Hiroshima and Nagasaki.
1946
June 14-Baruch presents the Acheson-Lilienthal plan to internationalize the atom to the U.N.
June 30- First subsurface detonation by U.S. at Bikini atoll.
July- Demonstrations in Times Square, New York, against nuclear testing.
December 31-AEC takes over nuclear weapons program from the Army.
1948
April, May-U.S. atomic tests, Eniwetok Atoll.
1949
April 4- NATO established.
August 29- First Soviet detonation, in the Ustyurt desert.
October 30-General Advisory Committee of the AEC recommends that the more powerful atomic
bombs should be built rather than hydrogen bombs.