Visit Website Did you know? After World War II, most of Hiroshima would be rebuilt, though one destroyed section was set aside as a reminder of the effects of the atomic bomb. Each August 6, thousands of people gather at Peace Memorial Park to join in interfaith religious services commemorating the anniversary of the bombing.
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.The Soviet atomic bomb project (Russian: Советский проект атомной бомбы, Sovetskiy proyekt atomnoy bomby) was the classified research and development program that was authorized by Joseph Stalin in the Soviet Union to develop nuclear weapons during World War II..
Although the Soviet scientific community discussed the possibility of an atomic bomb throughout the s. The Atomic Archive explores the complex history surrounding the invention of the atomic bomb.
Follow a timeline that takes you down the path of our nuclear past to the present. Read biographies of A-bomb father Robert Oppenheimer and Enrico Fermi's dispassionate account of the Trinity Test.
Examine maps of the damage to Hiroshima and Nagasaki, and summaries of arms-control treaties.
Atomic bomb: Atomic bomb, weapon with great explosive power that results from splitting the nuclei of a heavy metal such as plutonium or uranium. On August 6, , the B bomber Enola Gay dropped an atomic bomb on the city of Hiroshima. Twelve men were on that flight. Some chose to keep a low profile and others spoke out about their.
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or from a combination of fission and fusion reactions (thermonuclear bomb).Both bomb types release large quantities of energy from relatively small amounts of matter.
The first test of a fission ("atomic") bomb released an amount of energy approximately equal to. Nuclear weapon: Nuclear weapon, device designed to release energy in an explosive manner as a result of nuclear fission, nuclear fusion, or a combination of the two.
Fission weapons are commonly referred to as atomic bombs, and fusion weapons are referred to as thermonuclear bombs or, more commonly, hydrogen bombs.