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The devastation caused in Hiroshima was not enough to convince the Japanese War Council to accept the Potsdam Conference’s demand for unconditional surrender.
Meanwhile, the United States had already planned drop its second atomic bombnicknamed “Fat Man”, on August 11 in case of such stubbornness, but the expected bad weather for that day moved the date forward to August 9.
That is why, at 1:56 am, a specially adapted B-29 bomber, named “Bockscar”, after its usual commander, Frederick Bock, took off from Tinian Island under the command of Major Charles W. Sweeney.
Nagasaki was a center of shipbuilding, the same industry destined for destruction. The bomb was dropped at 11:02 am, 1,650 feet above the city.
The explosion unleashed the force equivalent to 22,000 tons of TNT, the hills surrounding the city did a better job of containing the destructive force, but the death toll is estimated to be between 60,000 and 80,000 (exact figures are impossible, the explosion obliterated bodies and disintegrated records).
General Leslie R. Groves, the man responsible for organizing the Manhattan Project, who solved the problem of producing and launching the nuclear explosion, estimated that another atomic bomb would be ready to use against Japan on August 17 or 18, but it was not necessary.
Although the War Council remained divided (“It is too early to say the war is lost,” opined the War Minister), Emperor Hirohito, at the request of two War Council members eager to end the war, met with the Council and declared that “Continuing the war can only result in the annihilation of the Japanese people…“That is why, the Emperor of Japan gave his permission for the unconditional surrender.