Part of what got BO elected was the ever growing number of voters for whom the Berlin Wall and the era of Soviet communism are a mere footnote in history.
They can not comprehend seeing a thriving bustling Late 20th century West Berlin and the drabness of "post WWII " East Berlin, separated not by time, but merely by the death strip where the "ideals of socialism" needed to resort to machinegun towers, land mines and vehicle barriers merely to keep "citizens" IN.