In December 1938, a team of German physicists achieved an astonishing scientific breakthrough: they split the nucleus of a uranium atom. In the United States, news of the discovery sparked fear in the scientific community. Atomic fission could power a devastating new weapon, and Adolf Hitler’s Germany had a head start.In response, President Roosevelt launched an unprecedented mobilization of American science and industry. The race was on to assemble the team that would design and build the first atomic bomb.Listen to American History Tellers on the Wondery App or wherever you get your podcasts. Experience all episodes ad-free and be the first to binge the newest season. Unlock exclusive early access by joining Wondery+ in the Wondery App, Apple Podcasts or Spotify. Start your free trial today by visiting wondery.com/links/american-history-tellers/ now.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.