West Berlin citizens hold a vigil atop the Berlin Wall in front of the Brandenburg Gate on November 10, 1989, the day after the East German government opened the border between East and West Berlin. #

On August 13, 1961, East Germany closed its borders with the west. Here, East German soldiers set up barbed wire barricades at the border separating East and West Berlin. West Berlin citizens watch the work. #

A young East Berliner erects a concrete wall that was later topped by barbed wire at a sector border in the divided city August 18, 1961. East German police stand guard in background as another worker mixed cement. #

Tracks of the Berlin elevated railroad stop at the border of American sector of Berlin in this air view on August 26, 1961. Beyond the fence, communist-ruled East Berlin side, the tracks have been removed. #

Formidable concrete walls took shape at the seven crossing points between East and West Berlin on December 4, 1961. The new walls were seven feet high and five feet thick. Only small passages for traffic were left open. In center of the Bornholmer Bridge (French/Russian sector border), behind steel tank traps, a big sign showing the East German emblem hammer and compass. #

Under the eye of a communist "people's policeman", East Berlin workers with a power shovel destroy one of a number of cottages and one-family houses along a sparsely settled stretch of the east-west Berlin boundary in October of 1961. #

Typical of East Berlin measures to halt the escape of refugees to the west are these bricked-up windows in an apartment house along the city's dividing line October 6, 1961. The house, on the South side of Bernauerstrasse, is in East Berlin. #

East German border guards carry away a refugee who was wounded by East German machine gun fire as he dashed through communist border installations toward the Berlin Wall in 1971. #

East Berlin laborers work on "Death Strip" which communist authorities created on their side of the border in the divided city on October 1, 1961. A double barbed wire fence marks the border, with West Berlin at right. In this view of the area laborers level rubble of houses which, just days before, stood on the site close to the border. Buildings along the 25-mile dividing line were evacuated and razed by Berlin reds to eliminate one means of escape used by East Berliners to jump to the west. #

Dying Peter Fechter is carried away by East German border guards who shot him down when he tried to flee to the west in this August 17, 1962 photo. Fechter was lying 50 minutes in no-man's land before he was taken to a hospital where he died shortly after arrival. #

View from top of the old Reichstag building of the Brandenburg Gate, which marks the border in this divided city. The semi-circled wall around the Brandenburg Gate was erected by East German Vopos on November 19, 1961. #

The Brandenburg Gate is shrouded in fog as a man looks from a watchtower over the Wall to the Eastern part of the divided city on November 25, 1961. The tower was erected by the West German police to observe the Inner-German border. #

East German border guards carry away a 50 year old refugee, who was shot three times by East German border police on September 4, 1962, as he dashed through communist border installations and tried to climb the Berlin wall in the cemetery of the Sophien Church. #

Reverend Martin Luther King, American civil rights leader, invited to Berlin by West Berlin Mayor Willy Brandt, visits the wall on September 13, 1964, at the border Potsdamer Platz in West Berlin. #

A mass escape of 57 people in October 1964 from East Berlin through a tunnel to the cellar of a former bakery in "Bernauer Street", West Berlin. Picture of the tunnel exit. #

(1 of 3) Two East Berliners jump across border barriers on the Eastern side of border checkpoint at Chaussee Street in Berlin in April of 1989. They were stopped by gun wielding East German border guards and arrested while trying to escape into West Berlin. People in the foreground, still in East Berlin, wait for permits to visit the West. #

(2 of 3) Two East Berlin refugees are taken away by border guards after a thwarted escape attempt at Berlin border crossing Chausseestreet, in this April 1989 picture. #

(3 of 3) An East Berlin border guard, cigarette in mouth, points his pistol to the scene where two East Germans were led away after failing to escape to the west at Berlin border crossing Chausseestrasse. Eyewitnesses reported the guard also fired shots. #

A general view of the overcrowded East Berlin Gethsemane Church on October 12, 1989. About 1,000 East Germans took part in a prayer service here for imprisoned pro-democracy protesters. The church was the focus of protests in the final days of the wall. #

An unidentified East German border guard gestures toward some demonstrators, who who threw bottles on the eastern side of newly-erected barriers at the Checkpoint Charlie crossing point on October 7, 1989. #

East and West Berliners mingle as they celebrate in front of a control station on East Berlin territory, on November 10, 1989, during the opening of the borders to the West following the announcement by the East German government that the border to the West would be open. #

East Berliners get helping hands from West Berliners as they climb the Berlin Wall which divided the city for decades, near the Brandenburger Tor (Brandenburg Gate) on November 10, 1989. #

West Berliners crowd in front of the Berlin Wall early November 11, 1989 as they watch East German border guards demolishing a section of the wall in order to open a new crossing point between East and West Berlin, near the Potsdamer Square. #

East and West German Police try to contain the crowd of East Berliners flowing through the recent opening made in the Berlin wall at Potsdamer Square, on November 12, 1989. #

Decades later, the Berlin Wall is a memory, pieces of it scattered around the world. Here, some original pieces of the wall are displayed for sale at the city of Teltow near Berlin, on November 8, 2013. #