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On 7 November 1917, Bolshevik revolutionaries overthrew the provisional government set up in Russia after the fall of the Tsar earlier that year, and created the world's first communist state - a state that would become the Soviet Union. Louise Hidalgo has been listening back to eye-witness accounts of that tumultuous time.

(Photo: Bolshevik leader Vladimir Lenin addressing crowds in the capital Petrograd during the Russian Revolution of 1917. Credit: Hulton Archive/Getty Images)