The Berlin Wall finally came down in 1989. Now readers can find out why it was built in the first place; and what it meant for Berliners living on either side of it. Here's the fascinating story of a city divided. In 1961, overnight a concrete border went up, dividing the city of Berlin into two parts - East and West. The story of the Berlin Wall holds up a mirror to post-WWII politics and the Cold War Era when the United States and...