Langemark in Belgium has the dubious honor of being the place where chemical warfare made its debut: on April 22, 1915, German soldiers opened gas bottles from which 180 tons of chlorine gas hissed away. At least a thousand soldiers died in a blind panic.
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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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