Overview of the entire Manhattan Project, and how it led directly into the beginning of the Cold War. Did a good job of explaining who the main personages of the A-Bomb project were, and of depicting the massive resources and effort that went into the project. Also explained well the logic of the massive costs of developing the Bomb guaranteeing that the Bomb would be used on a civilian target (since there were no purely military targets large enough to use the bomb on). Finally, Trinity made a good case that the regime of secrecy surrounding the Manhattan Project fed the distrust and paranoia of the Cold War, and sabotaged any prospect of nuclear arms control from the very start.