
Two nuclear weapons were dropped on Japan, one on the city of Hiroshima and the other on the city of Nagasaki. The United States and the Allies were fighting against Japan and slowly winning. Official photograph of the Office of Chief of Engineers, now in the collections of the National Archives. The Atomic bombings of Hiroshima and Nagasaki were nuclear attacks on the Empire of Japan during World War II (WWII). Boeing B-29 Superfortress, Enola Gay, returns after the strike Hiroshima, August 6, 1945. Image: 77-BT-91: Tinian Island, August 1945. Four days later, Japanese submarine, I-58, sank Indianapolis, northeast of Leyte.Ī replica of Little Boy can be found at " In Harm's Way: Pacific" exhibit area in the National Museum of the Navy, Bldg. Previously, on July 26, the bomb, along with " Fat Man" was transported to Tinian Island by USS Indianapolis (CA-35) for final assembly. A U-235 projectile fired down a gun barrel collided with a stationary element, causing a mass increase leading to nuclear fission. Nuclear fission was achieved by the collision of two parts of active material (Uranium-235). Three days later, they dropped another bomb on the city of Nagasaki. The gun-type weapon possessed the power of 26,000,000 pounds of high explosives. Septemby Kimota On August 6, 1945, the United States dropped an atomic bomb on the city of Hiroshima, Japan.

The bomb weighed 9,000 pounds and had a diameter of only 28 inches. The bomb was dropped by a USAAF B-29 bomber, Enola Gay, piloted by U.S. The atomic bomb used at Hiroshima, Japan, on August 6, 1945, was "Little Boy". On August 9, 1945, the United States dropped an atomic bomb on the city of Nagasaki, Japan, three days after bombing Hiroshima.
