A German women hangs clothing out to dry on a line strung between a tree and the Berlin Wall, Germany, November 13, 1963 (Photo by Express Newspapers/Getty Images).

Two men open a hollow metal drum used by three West German men to bring their girlfriends over the border from East Berlin, Germany, 1965. (Photo by Express Newspapers/Getty Images)

Sightseers climb onto a bus to look at the newly-built Berlin Wall. (Photo by Keystone/Getty Images). 1964

Officers inspecting the damage to the Berlin Wall, East Germany, and making preparations for its repair, after an East German rammed the Wall with an army car and successfully escaped. (Photo by Keystone/Getty Images). 1963

A barricade erected by the East German authorities to strengthen the existing barriers dividing East and West Berlin. (Photo by Central Press/Getty Images). 22nd November 1961

Barbed wire in front of the Brandenburg Gate. The sign warns that if you pass this point you are leaving West Berlin. (Photo by John Waterman/Fox Photos/Getty Images). Circa 1962

Two West Berlin policemen with their new American rapid fire rifles on duty with a snowman on Christmas Day in front of the Berlin Wall at the Brandenburg Gate. (Photo by Keystone/Getty Images). 25th December 1961

British troops ready for action in case of trouble at the East & West German border, near the Brandenburg Tor in Berlin. (Photo by Keystone/Getty Images). October 1961

Edmond Kayat of the Lebanon carrying an 80lb cross to demand “Consideration for Humanity” being turned back by the Volkspolizei at the Brandenburg Gate in Berlin. He is attempting to travel through East Germany after crossing through Switzerland and West Germany. (Photo by Keystone/Getty Images). 5th October 1961

West German police arrest a young man, one of the angry crowd throwing stones at a bus full of Soviet guards making their way to the Soviet War Memorial, 20th August 1962. The crowd were incensed by the death of 18-year-old Peter Fechter, who was shot while trying to cross the Berlin Wall a few days earlier. (Photo by Central Press/Hulton Archive/Getty Images)

A loudspeaker van from the West Berlin organisation SAS (Studio am Stacheldraht or Studio at the Barbed Wire) arrives at the Berlin Wall where a new section is being built, 23rd July 1962. Shortly after this, an East German police car turned up, blasting music and Communist propaganda from its loudspeakers. (Photo by Keystone/Hulton Archive/Getty Images)

A view from the east of Berliners gathered on the Berlin Wall to celebrate the New Year and the effective end of the city's partition, 31st December 1989. A banner reads “Good luck and peace for a new Germany – East Greets West”. (Photo by Steve Eason/Hulton Archive/Getty Images)

A little girl chisels away at the Berlin Wall from the east side on New Year's Eve, 31st December 1989. (Photo by Steve Eason/Hulton Archive/Getty Images)