World Leaders Celebrate 20th Anniversary of Fall of Berlin Wall

Guess who wasn't there?

British Prime Minister Gordon Brown, French President Nicolas Sarkozy, German Chancellor Angela Merkel, Russian President Dmitry Medvedev and German President Horst Koehler walk through the Brandenburg Gate in Berlin November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall.

Spectators watch as giant, painted styrofoam dominoes stand along the route of the former Berlin Wall near the Brandenburg Gate on November 9, 2009 in Berlin, Germany. The approximately 1,000 dominoes, painted by schoolchildren and artists all over the world, are meant to symbolically represent the end of communist rule across Eastern Europe and are the highlight of celebrations in the German capitol marking the 20th anniversary of the fall of the Berlin Wall.

German Chancellor Angela Merkel (C), former Soviet Union President Mikhail Gorbachev (L) and former Polish President Lech Walesa (2R) pose with a historical picture showing Bornholmer Bridge (Bornholmer Bruecke) in Berlin November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall.

There was another American President absent today. But he had already done his job:

The story of Reagan's "tear down this wall" speech.