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American Physicist who experimented in the release of atomic energy. Dr. John R.

American Physicist who experimented in the release of atomic energy. Dr. John R. Dunning, associate professor of physica at Columbia University, is one of the American scientists who helped in the development of the new atomic bomb. In New York City in 1939, Dr. Dunning took part in a series of experiments on the release of atomic energy. That energy was harnessed for the first time in history in the atomic bomb which possesses more power than 20,000 tons of TNT. The cosmic bomb has a destruction force equal to the load of 2,000 B-29 Superfortresses and has more than 2,000 times the blast power of what previously was the world's most devastating bomb, the 22,000-ton Britisch 'Grand Slam' bomb. A single atomic bomb was dropped on the Japanese industrial city of Hiroshima on August 5, 1945, and it wiped out 4.1 square miles or 60 percent of the city. On August 9, it was announced that a second atomic bomb had been dropped on the Japanese city of Nagasaki. The atomic bombs were used only after the enemy had rejected the Allies' Potsdam Ultimatium. Allied leaders expressed the hope that the Japanese would reconsider their rejection of unconditional surrender terms than bring complete destruction upon themselves.

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