Bustling: The Berlin Wall was built by East Germany in 1961, and the top image shows the wall around the Brandenburg Gate on Nov 19, 1961. Today the same area is filled with cars, buses and people moving freely around the German capital.
A citizen of East Berlin peers through barbed wire at a West Berliner over the Berlin Wall, Berlin, Germany, 1960s. The mass immigration of Germans from Communist Berlin to Western Berlin inspired East Germany military leader Erich Honeker to construct the blockade, a barricade of concrete walls, mine fields and guard posts that stretched for 100 miles. (Photo by Hulton Archive/Getty Images)