Tensions are starting to rise during the beginning of the Cold War. In 1948 the Russians wanted starve out the (U.S, Great Britain, and France) "western sectors by closing off all of the land route to the city"(history today.com). The U.S and its Allies did not retreat. They supplied their sections of the city from the air, this was called the Berlin Airlift. This lasted until 1949 when the Soviets decided to end their blockade.
Things were "relatively" calm for almost a decade until 1958. Then the Soviets launched a successful Sputnik satellite, which was also the start of the space race. During the first couple years of the space race negotiations and conferences happened about the number of refuges but nothing was resolved.
On November 9, 1989, "The Cold War" began to come to an end across eastern Europe. On that same day the spokesman of the East German Communist Party announced that people could cross east and west Germany freely without being killed. Many people stormed the wall in celebration, crossing to the other side. Others brought hammers and picks to break the wall. More than 2 million people from east Berlin came to west Berlin for a celebration party. During all of this, cranes and bulldozers were taking down chunks of the wall.