From the dawn of the atomic age until the fall of the Soviet Union, the spectre of nuclear apocalypse hung over the world. Families prepared fallout shelters. Children were trained to run, duck and cover. The Dr. Strangeloves of the RAND Corporation talked about winnable nuclear wars and the public was taught about the doctrine of Mutually Assured Destruction. But that was the Cold War, a relic of a bygone age. Or so we thought.