A 1939 photo of an atom-smasher (cyclotron) at Columbia University. Via Wiki Commons.
Most people assume that “The Manhattan Project” is a clever codename, a misnomer for the famous test sites in New Mexico. But, with over 1,200 tons on uranium stashed on Staten Island, and a nuclear reactor whizzing away at Columbia University, the top-secret wartime program began in Manhattan, and fanned out across the island, from its southern tip to its northern reaches, from its dimmest docks to its brightest towers. Ultimately 5,000 people poured into New York to work on the project, so duck, cover and get ready for an atomic tale of scientists, soldiers, and spies.