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Berlin's Mayor Klaus Wowereit (2nd R) and Moritz van Duelmen (R), director of cultural not-for-profit organization Kulturprojekte Berlin attend the start of the light installation Lichtgrenze (Light border) on the course of the former Berlin wall in Berlin on November 7, 2014. Germany kicked off celebrations of the 25th anniversary of the epochal fall of the Berlin Wall Friday, set to culminate in rock stars and freedom icons joining millions at an open-air party. AFP PHOTO / TOBIAS SCHWARZTOBIAS SCHWARZ/AFP/Getty Images
Berlin's Mayor Klaus Wowereit (2nd R) and Moritz van Duelmen (R), director of cultural not-for-profit organization Kulturprojekte Berlin attend the start of the light installation Lichtgrenze (Light border) on the course of the former Berlin wall in Berlin on November 7, 2014. Germany kicked off celebrations of the 25th anniversary of the epochal fall of the Berlin Wall Friday, set to culminate in rock stars and freedom icons joining millions at an open-air party. AFP PHOTO / TOBIAS SCHWARZTOBIAS SCHWARZ/AFP/Getty Images

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Mayor: I'm proud of Berlin

CNN's Hala Gorani speaks to Klaus Wowereit, Mayor of Berlin, about what he remembers on the day the Berlin Wall came down.

Mayor: I'm proud of Berlin

CNN's Hala Gorani speaks to Klaus Wowereit, Mayor of Berlin, about what he remembers on the day the Berlin Wall came down.