Then Soviet Leader Mikhail Gorbachev congratulates the East German Leader Erich Honecker with a fraternal hug and kiss after Honecker's re-election as General Secretary of the Communist Party Congress in East Berlin, April 21, 1986. (Photo by Reuters)





West German citizens sit on the top of the Berlin wall near the Allied checkpoint Charlie after the opening of the East German border, November 9, 1989. (Photo by Fabrizio Bensch/Reuters)





East German citizens climb the Berlin wall at the Brandenburg Gate as they celebrate the opening of the East German border, November 10, 1989. (Photo by Reuters)





East German citizens climb the Berlin wall at the Brandeburg gate after the opening of the East German border was announced, November 10, 1989. (Photo by Reuters)





An East German border soldier looks at a man hammering a section of the Berlin Wall near the Allied checkpoint Charlie, June 2, 1990. (Photo by Reuters)





Berliners take a hammer and chisel to a section of the Berlin Wall in front of the Brandenburg Gate after the opening of the East German border was announced, November 9, 1989. (Photo by Reuters)





A man hammers a section of the Berlin Wall near the Brandenburg Gate after the opening of the East German border was announced, November 9, 1989. (Photo by Reuters)





West Berlin citizens continuing their vigil atop the Berlin Wall in front of the Brandenburg Gate, November 10, 1989. (Photo by David Brauchli/Reuters)





An East Berlin citizen embraces a West Berlin woman while an East German border soldier watches on at the border checkpoint Invalidenstrasse after the opening of the East German border was announced in Berlin, November 9, 1989. (Photo by Fabrizio Bensch/Reuters)





East German citizens help each other climb the Berlin Wall at the Brandenburg gate after the opening of East German borders, November 10, 1989. (Photo by Reuters)





An East Berlin border guard hands a flower back to West Berlin citizens who are sitting atop the Berlin Wall in front of the Brandenburg Gate, November 10, 1989. (Photo by Reuters)





West Berlin citizens welcome East Germans who passed the border checkpoint Invaliden Strasse with an East German Trabant car, November 10, 1989. (Photo by Reuters)





A young West German girl hammer the Berlin Wall, November 19, 1989. (Photo by Reuters)





East German citizens help each other climb the Berlin Wall at the Brandenburg gate after the opening of East German borders, November 10, 1989. (Photo by Reuters)





West Germans applaud as East Berlin citizens travel through Checkpoint Charlie, at the Berlin Wall, at the border of West Berlin, November 10, 1989. (Photo by David Brauchli/Reuters)





Hundreds of East Berlin border guards stand atop the Berlin Wall at the Brandeburg Gate faced by thousands of West Berliners, November 11, 1989 file photo. (Photo by Reuters)





A young West German girl smiles at her father as she points to a large hole in the Berlin Wall, November 11, 1989. (Photo by Reuters)





Border guards repair a section of the Berlin Wall, after protesters knocked it over earlier during the day, November 11, 1989. (Photo by Reuters)





West Berlin citizens continue their vigil atop the Berlin Wall in front of the Brandenburg Gate, November 10, 1989. (Photo by Andree Kaiser/Reuters)





West Berliners welcome an East Berlin citizen crossing the border at the Allied checkpoint Charlie after the opening of the East German border was announced, November 9, 1989. (Photo by Reuters)





An East German man raises up his fist as he passes the border at the checkpoint Invaliden Strasse after the opening of the East German border was announced, November 10, 1989. (Photo by Reuters)





Russian cellist and composer Mstislav Rostropovich is filmed by media as he plays Bach next to the Berlin wall at Checkpoint Charlie, November 12, 1989. (Photo by Reuters)





An East German border soldier looks through a large hole into the Berlin Wall after the opening of the East German border was announced, February 8, 1990. (Photo by Reuters)





East Berliners cross and meet West Berliners at Potsdamer Platz after the Berlin Wall was torn down here making way for a new border crossing, November 12, 1989. (Photo by Reuters)





People hold a German flag with the word reading 'Unity' as they cross the newly opened checkpoint between East and West Berlin at the Brandenburg Gate, December 22, 1989. (Photo by Fabrizio Bensch/Reuters)





East German Trabant cars make their way past East Germans who have crossed the former border checkpoint Rudolphstein in Bavaria on motorway A9 after the opening of the East German border was announced, November 11, 1989. (Photo by Reuters)





Soldiers of French, British, and American Forces carry away the sign of the Allied Checkpoint Charlie in Berlin, June 22, 1990. (Photo by Reuters)





An East German bulldozer and crane knock down the Berlin Wall at Potsdamer Platz to make way for a new border crossing in the dvided city, November 12, 1989. (Photo by Reuters)





East German workers remove concrete parts of the Berlin Wall and load them onto trucks at the recently opened border crossing point at Potsdam Platz, November 14, 1989. (Photo by Wolfgang Rattay/Reuters)





An East German refugee shows off a newly acquired West German passport just before crossing the Hungarian border in to Austria, September 10, 1989. (Photo by Reuters)





East and West German citizens celebrate as they climb the Berlin wall at the Brandenburg gate, November 9, 1989. (Photo by Fabrizio Bensch/Reuters)





West Berlin citizens welcome East Germans who passed the border checkpoint Invalidenstrasse in Berlin, November 9, 1989. (Photo by Fabrizio Bensch/Reuters)





East German soldiers cordon off the border line in front of West Berliners waiting to welcome East Berlin citizens at the Allied checkpoint Charlie, November 9, 1989. (Photo by Fabrizio Bensch/Reuters)





An East German civilian (L) shows an East German customs officer the contents of his Trabant (auto) at checkpoint Potsdamer Platz in East Berlin in this November 24, 1989 file picture, as East Germany enforcing stringent customs controls to avoid smuggling. (Photo by Reuters)





The first section of the Berlin Wall to be dismantled by East Germany is lifted by a crane near the Brandenburg Gate in East Berlin, December 22, 1989. (Photo by Fabrizio Bensch/Reuters)





Thousands walk along the Berlin Wall between Potsdamer Platz and Brandenburg Gate November 18, 1989 file photo. (Photo by Reuters)