Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

TO GO WITH AFP STORY by  Audrey KAUFFMANN and PACKAGE "Germany-east-History-20years"  FILES - West Berliners crowd in front of the Berlin Wall early 11 November 1989 as they watch East German border guards demolishing a section of the wall in order to open a new crossing point between East and West Berlin, near the Potsdamer Square. Two days before, Gunter Schabowski, the East Berlin Communist party boss, declared that starting from midnight, East Germans would be free to leave the country, without permission, at any point along the border, including the crossing-points through the Wall in Berlin. The Berlin concrete wall was built by the East German government in August 1961 to seal off East Berlin from the part of the city occupied by the three main Western powers to prevent mass illegal immigration to the West. According to the "August 13 Association" which specialises in the history of the Berlin Wall, at least 938 people - 255 in Berlin alone - died, shot by East German border guards, attempting to flee to West Berlin or West Germany.   AFP PHOTO / GERARD MALIE (Photo credit should read GERARD MALIE/AFP/Getty Images)
TO GO WITH AFP STORY by  Audrey KAUFFMANN and PACKAGE "Germany-east-History-20years"  FILES - West Berliners crowd in front of the Berlin Wall early 11 November 1989 as they watch East German border guards demolishing a section of the wall in order to open a new crossing point between East and West Berlin, near the Potsdamer Square. Two days before, Gunter Schabowski, the East Berlin Communist party boss, declared that starting from midnight, East Germans would be free to leave the country, without permission, at any point along the border, including the crossing-points through the Wall in Berlin. The Berlin concrete wall was built by the East German government in August 1961 to seal off East Berlin from the part of the city occupied by the three main Western powers to prevent mass illegal immigration to the West. According to the "August 13 Association" which specialises in the history of the Berlin Wall, at least 938 people - 255 in Berlin alone - died, shot by East German border guards, attempting to flee to West Berlin or West Germany.   AFP PHOTO / GERARD MALIE (Photo credit should read GERARD MALIE/AFP/Getty Images)

    JUST WATCHED

    What history tells us about Trump's wall

MUST WATCH

What history tells us about Trump's wall

The world has a lot of famous border walls. CNN looks at how they compare to President Donald Trump's proposed US-Mexico wall.

What history tells us about Trump's wall

The world has a lot of famous border walls. CNN looks at how they compare to President Donald Trump's proposed US-Mexico wall.