The Atomic Bomb Built by Segregated Black Hands Between 1942 and 1944, around 15,000 Black workers arrived in Washington State to work on the Manhattan Project's Hanford Site. They built the nuclear reactors and processing plants that produced the plutonium for the atomic bomb. But their story has been almost completely erased from history. This is the untold account of how Black workers were deliberately recruited under President Roosevelt's Executive Order 8802 (which prohibited racial discrim