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Robert Oppenheimer worked to turn these materials into a workable atomic bomb. Early on the morning of July 16,the Manhattan Project held its first successful test of an atomic device—a plutonium bomb—at the Trinity test site at Alamogordo, New Mexico. Japan, however, vowed to fight to the bitter end in the Pacific, despite clear indications as early as that they had little chance of winning.
In fact, between mid-April when President Harry Truman took office and mid-July, Japanese forces inflicted Allied casualties totaling nearly half those suffered in three full years of war in the Pacific, proving that Japan had become even more deadly when faced with defeat.
In order to avoid such a high casualty rate, Truman decided—over the moral reservations of Secretary of War Henry Stimson, General Dwight Eisenhower and a number of the Manhattan Project scientists—to use the atomic bomb in the hopes of bringing the war to a quick end.
After arriving at the U. More powerful than the one used at Hiroshima, the bomb weighed nearly 10, pounds and was built to produce a kiloton blast.
The formal surrender agreement was signed on September 2, aboard the U. Start your free trial today.In just one second, in early August, , the world was changed forever. Since , a secret U.S.
weapons program, called the Manhattan Project, had been at work on two revolutionary bombs of such intense heat and explosive force that they would reduce the two target cities—Hiroshima and Nagasaki—to vast scorched wastelands.
Nov 18, · On August 6, , during World War II (), an American B bomber dropped the world’s first deployed atomic bomb over the Japanese city of Hiroshima.
The explosion wiped out 90 percent. Minutes of the second meeting of the Target Committee Los Alamos, May , Source: U.S. National Archives, Record Group 77, Records of the Office of the Chief of Engineers, Manhattan Engineer District, TS Manhattan Project File ''46, folder 5D Selection of Targets, 2 Notes on Target Committee Meetings.
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world. On this day a single bomb dropped by a single airplane destroyed the city, leading to the end of World War II and introducing mankind to the Atomic Age.
Dr. Michihiko Hachiya lived through that day and kept a diary of his experience. He served as Director of the Hiroshima Communications.
William L. Laurence's eyewitness account of the atomic bomb attack on Nagasaki, Japan. Mar 14, · Hiroshima: Dropping The Bomb - Hiroshima - BBC BBC Studios. Loading Unsubscribe from BBC Studios? Cancel Unsubscribe. Working Subscribe Subscribed Unsubscribe M.