Atomic bombings of Hiroshima and Nagasaki - Wikipedia, the free encyclopedia

By August 1945, the Allied Manhattan Project had successfully tested an atomic device and had produced weapons based on two alternate designs. The 509th Composite Group of the U.S. Army Air Forces was equipped with a Silverplate Boeing B-29 Superfortress that could deliver them from Tinian in the Mariana Islands.

Test scooping Wikipedia