Former US secretary of state Henry Kissinger (L) and former president of the Soviet Union Mikhail Gorbachev pose before unveiling of a bust of Gorbachev by French artist Serge Mangin in Berlin, on November 9, 2009, as Germany is celebrating the 20th anniversary of the fall of the Berlin Wall. Getty Images logo Getty Images 27 months ago

Former US secretary of state Henry Kissinger (L) and former president of the Soviet Union Mikhail Gorbachev pose before unveiling of a bust of Gorbachev by French artist Serge Mangin in Berlin, on November 9, 2009, as Germany is celebrating the 20th anniversary of the fall of the Berlin Wall.