[Photographs: Robert Lacke]
"As tensions grew between the Soviet bloc and the western allies, passage between the zones shrank to a trickle. In 1961, the split was formalized with the construction of a wall."
Time  The Berlin Wall: The Rise and Fall of the Barrier between East and West. [online] http://www.time.com/time/photogallery/0,29307,1631993,00.html