Like what I make? Want fewer sponsorship ad reads? Consider contributing to my Patreon at https://patreon.com/OurOwnDevices The Manhattan Project, the wartime effort to build the first atomic bomb, was one of the most astonishing scientific and technical undertakings in history. But two years and billions of dollars in, an alarming discovery threatened to derail the project entirely, and the feasibility of the atomic bomb came to rest on a single experiment codenamed RaLa.