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Weapons improvements took on two primary forms. One was an increase in efficiency and power, and within only a few years fission bombs were developed that were many times more powerful than the ones created during World War II. The other was a program of miniaturization, reducing the size of the nuclear weapons.
1941 – May – A review committee postulates that the United States will not isolate enough uranium-235 to build an atomic bomb until 1945. [6] 1941 – June – President Roosevelt forms the Office of Scientific Research and Development under Vannevar Bush. 1941 – June 15 – The MAUD Committee approves a report that a uranium bomb could ...
Explosive bombs were used in East Asia in 1221, ... A thermal wave is created by the sudden release of heat caused by an explosion. Military bomb tests have ...
The first nuclear weapons were gravity bombs, such as this "Fat Man" weapon dropped on Nagasaki, Japan. They were large and could only be delivered by heavy bomber aircraft A demilitarized, commercial launch of the Russian Strategic Rocket Forces R-36 ICBM; also known by the NATO reporting name: SS-18 Satan.
The discovery of nuclear fission by Otto Hahn and Fritz Strassmann in 1938, and its theoretical explanation by Lise Meitner and Otto Frisch, made an atomic bomb theoretically possible. There were fears that a German atomic bomb project would develop one first, especially among scientists who were refugees from Nazi Germany and other fascist ...
Under the direction of General Leslie Groves, over thirty different sites were constructed for the research, production, and testing of components related to bomb-making. These included the Los Alamos National Laboratory at Los Alamos, New Mexico , under the direction of physicist Robert Oppenheimer , the Hanford plutonium production facility ...
The Trinity bomb was officially a Y-1561 device, as was the Fat Man used later in the bombing of Nagasaki. The two were very similar, though the Trinity bomb lacked fuzing and external ballistic casing. The bombs were still under development, and small changes continued to be made to the Fat Man design. [59]
Date created Inventor Place of origin Barrel bomb: Improvised unguided aerial bomb made from a barrel or barrel-shaped container filled with explosives. They can sometimes be filled with chemicals, shrapnel and oil. 1948 Israel: Blockbuster bomb "High capacity" bomb for maximum blast effect, only used during World War II. April 1941 United Kingdom