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After several weeks of civil unrest, the East German government announced on 9 November 1989 that all GDR citizens could visit West Germany and West Berlin.
The "fall of the Berlin Wall" paved the way for German reunification, which formally took place on 3 October 1990.
It culminated in one of the most famous scenes in recent history - the fall of the Berlin Wall. The wall came down partly because of a bureaucratic accident but it fell amid a wave of revolutions that left the Soviet-led communist bloc teetering on the brink of collapse and helped define a new world order.