The term ''Manhattan Project'' was the code word for the project that developed the first nuclear weapons - "atomic bombs" as they were then called - in history. The formal code name was "Manhattan Engineering District," named after the Manhattan Engineer District of the [[United States Army Corps of Engineers]]. Manhattan borough had at least 10 sites that supported the project, including the project's first headquarters located in a skyscraper across from City Hall.<ref>Robert S. Norris, "The Manhattan Project" (Black Dog & Leventhal). The book claims that spies stole some of the project's top secrets from Manhattan.</ref> | The term ''Manhattan Project'' was the code word for the project that developed the first nuclear weapons - "atomic bombs" as they were then called - in history. The formal code name was "Manhattan Engineering District," named after the Manhattan Engineer District of the [[United States Army Corps of Engineers]]. Manhattan borough had at least 10 sites that supported the project, including the project's first headquarters located in a skyscraper across from City Hall.<ref>Robert S. Norris, "The Manhattan Project" (Black Dog & Leventhal). The book claims that spies stole some of the project's top secrets from Manhattan.</ref> |