Heads of state accompany German Chancellor Angela Merkel (4-L) after they walked through the Brandenburg Gate in Berlin late on November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall. A Berlin Wall anniversary plea by world leaders for a new fight against 'tyranny' was hailed as Germany cleared away its dominoes of freedom. Getty Images logo Getty Images 27 months ago

Heads of state accompany German Chancellor Angela Merkel (4-L) after they walked through the Brandenburg Gate in Berlin late on November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall. A Berlin Wall anniversary plea by world leaders for a new fight against 'tyranny' was hailed as Germany cleared away its dominoes of freedom.