History of Berlin to intervene. In 1968 and after, West Berlin became one of the centers of the student revolt; in particular, the Kreuzberg borough was the center of many riots. The Fall of the Berlin Wall in November 1989 marks the end of the Cold War. On 9 November 1989, border guards allowed crowds from East Berlin to cross the frontier at the Bösebrücke. The guards believed that the authorities had decided to open the wall, but in reality no firm decision was taken and events gathered steam on their own. People of East and West Berlin climbed up and danced on
Berlin Wall near Potsdamer Platz where the stretch of both walls is marked, giving visitors an impression of the dimension of the barrier system. After the fall of Berlin Wall, there were initiatives that they want to preserve the death strip walkways and redevelop it into a hiking and cycling area, known as Berliner Mauerweg. It is part of the initiative by Berlin Senate since 2005. For many years after reunification, people in Germany talked about cultural differences between East and West Germans (colloquially "Ossis" and "Wessis"), sometimes described as "Mauer im Kopf" (The wall in the head). A September 2004 poll