Assistir Assistir PobreTV. Built at the height of the Cold War to withstand a five-megaton nuclear assault, the Diefenbunker is a massive underground, four-storey, 100,000-square-foot fortress designed and constructed entirely in secrecy in 1959. Inspired by the objects, rooms, and spaces of this Canadian Historic Site, the stop-animation film imagines the beginning of a nuclear war.