The appearance of a hastily constructed barbed wire entanglement through the heart of Berlin during the night of 12-13 August 1961 was both dramatic and unexpected. Within days, it had started to metamorphose into a structure that would come to symbolise the brutal insanity of the Cold War: the Berlin Wall. A city of almost four million was cut ruthlessly in two, unleashing a potentially catastrophic East-West crisis and plunging the entire world for the first time into the fear of imminent missile-borne apocalypse. This threat would vanish only when the very people the Wall had been built to imprison breached it on the historic night of 9 November 1989. The Berlin Wall is the definitive account of a divided city and its people.