Berlin: Checkpoint Charlie

Berlin was divided into four parts following World War II, each part being owned by a different country. The east was Communist, and was controlled by the Russians. On the west (capitalist), France, Britain, and America controlled Berlin. Each of these three capitalist nations had checkpoints where those crossing the east/west border had to be, basically, checked. These checkpoints are called Checkpoint Alpha, Checkpoint Bravo, and Checkpoint Charlie (this one was the American Sector entrance).