Nuclear weapons
Fat Man, the atomic bomb detonated over Nagasaki
Nuclear Weapon of the "Fat Man" type, the kind detonated over Nagasaki, Japan, in World War II. he-bomb is 60-inches in diameter and 128- inches long'. The second nuclear weapon to be detonated. it weighed about 10,000 pounds and had a yield of equivalent to approximately 20,000 tons of high explosive.
President Harry S. Truman Signing an Executive Order with Members of the Atomic Energy Commission
In the presence of the Atomic Energy Commission, President Harry S. Truman signs an Executive Order that ended the wartime Manhattan Project and transferred its responsibilities to civilian authority. From left to right, Carroll Wilson, President Harry S. Truman, David Lilienthal, Sumner Pike, Colonel K.D. Nichols, Secretary of War Robert P. Patterson, General Leslie Groves, Lewis L. Strauss, and William W. Waymack. From the Scrapbooks of Matt Connelly, Volume 2.