The Convair B-36 Peacemaker was, for a decade, the largest bomber ever built, a six-engine, propeller-driven giant designed before the jet age to carry atomic bombs from American soil to Moscow without refueling. This film traces its development from a desperate 1941 contingency plan, drawn up in case Britain fell and the US lost its European air bases, through the technical headaches of building an aircraft that size: engines prone to fire, a wingspan that outstripped existing runways, and a crew cabin so long it needed a wheeled trolley to move between stations. Archival footage and expert interviews cover the plane's role as the backbone of Strategic Air Command's nuclear deterrent in the early 1950s, the political fights over its enormous cost, and its rapid obsolescence once jet bombers like the B-52 arrived. The film also gets into the human side, the risks aircrews faced flying an experimental nuclear-armed giant, before tracking the Peacemaker's retirement and its place in Cold War history.