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  Berlin people were split up and torn away from friends.
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  The Soviet Military administration guards the demarcation line between East and West Germany.
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  The German people used a pass to get from East and West Germany legally. The pass let the government track who crosses the line.
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  Berlin is divided into two different currency zones.
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  This is when the Berlin blockade began. This was a major international crisis of the Cold War.
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  The Berlin Airlift begins and it ends about a year later.
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  The Federal Republic of Germany was founded. This is West Germany.
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  German Democratic Republic is founded, this is East Germany.
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  Border between East and West Germany and East and West Berlin is closed. The border between East and West Berlin is the only one still open.
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  Uprising of East Berlin building workers against the imposition of the increased working norms.
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  Leaving East Germany without permission is prohibited and violators are prosecuted with prison up to three years.
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  The Western Powers waive the interzonen, the Soviet Union follows but East German citizens need permission to travel to the West.
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  The Berlin sectorial border between East and West Berlin is closed, borders are built.
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  All crossing points for West Berlin citizens.
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  President J.F.Kennedy visits Berlin and says "ich bin ein Berliner.". That means "I am Berliner"
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  West Berlin citizen may visit East Berlin the first time after more than two years.
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  Four Power's Agreement over Berlin visiting becomes easier for West Berlin
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  President Ronald Reagan visits Berlin and urges Soviet leader Mikhail Gorbachev to tear down the Berlin Wall.
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  Hungarian government opens border for East Germany refugees.
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  The Berlin Wall is opened on November 9, 1989. The Brandenburg Gate is opened on December 22, 1989. On October 3, 1990 Germany was reunited.