During the First World War, the German army erected a high-voltage barrier of over three hundred kilometres from Knokke to the Three-Country Point near Aachen: the Wire of Death.
The German army fenced off the border between Belgium and the Netherlands from 1915 with a three-wire fence. Electric current of 2,000 volts was rushed through the middle wire.
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On November 9, 1989, the Berlin Wall, a symbol of Cold War division and oppression, was breached. Berliners poured through the newly opened checkpoints.
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