The Manhattan Project was the codename for a project conducted during World War II to develop the first atomic bomb.

The nuclear fallout released in this accident was four hundred times more than the atomic bombing of Hiroshima.

Little Boy, the atomic bomb which ever blowed Hiroshima (in Japan) was dropped by B-29 Superfortress Enola Gay, piloted by :

The world's first Atomic Bomb was detonated on July 16, 1945 on the White Sands Testing Range near Alamogordo, New Mexico

Which country in the atomic bomb by the United States in the year 1945