I remember the early evening of 9 November 1989. A bunch of us were hanging out on our floor in my college dorm when my roommate told us to come in and watch what was on TV. We saw Germans atop the Berlin Wall waving the Federal (West German) flag, and not getting shot.
Today's Times has a good set of photos from the wall's construction in 1961 to its destruction in 1989. as does CNN. Berliner Zeitung has an interview with Andrei Gratchev, Mikhail Gorbachev's spokesman from then, about the relationship between East Germany and the USSR. The Beeb explains how illegal raves brought the younger generation together and helped precipitate the East's collapse.
Germany reunified less than a year later.