Potsdam has no airport but Berlin is nearly Potsdam- via Airport Tegel you can go by bus or train.
here the "shopping" street :
last a picture of "Glinicker Brücke"
you know the hisstory of this bridge?
The steel bridge was rebuilt in 1947-1949 and was - shortly after the foundation of the two german states - reopened in December 1949 as the “Bridge of Unity”. The border between the Federal Republic of Germany and the German Democratic Republic ran through the middle of the bridge.