'Tor auf! Tor auf!'

TOUR: 'Open the Gate!' - the Fall of the Berlin Wall.

If '9/11' was when the 21st century began, then the 20th ended on the 9th of November, 1989.

Follow the events of that dramatic day, hour-by-hour, minute-by-minute, across the former East Berlin.

Visit a standing section of the Berlin Wall and see how it functioned as part of the frontier.

See the former East German Interior Ministry where the day's events began.

Take in the former Council of State building and the Central Comittee of the Politburo .

See where it all went wrong at the International Press Conference Centre.

And see where it all finally ended at the largest border checkpoint in Berlin.

How did the Wall that had stood for 28 years collapse as quickly as it did?

How did Berliners overcome their fear of the border troops and the Wall itself?

What is the legacy of the fall of the Wall in 2011?