World War II came to a radically-unpredictable conclusion when Japan was bombed - twice - by the most powerful individual weapons ever used on human beings. The scientific knowledge necessary to accomplish the creation of the atomic bomb was only made possible a few short years before this when non-Nazi Germany scientists discovered nuclear fission in 1938. Determined to unlock the power of the atom before Hitler could, the United States & the United Kingdom got quickly to work - eventually combining their efforts - to master the chemistry, physics, engineering, industry, and logistics necessary (costing $2 Billion in 1945 money) to create the first nuclear weapons. This episode does not attempt to explain the bombs on a scientific level. Rather, we will survey the history surrounding the formation, the maintenance, and the successful conclusion of the Manhattan Project.