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People play tug-of-war during National Unity Day celebrations in Moscow, Russia, on Nov. 4, 2017. The National Unity Day marks the liberation of Moscow from Polish invaders in 1612. (Xinhua/Oleg Brusnikin)

People play tug-of-war during National Unity Day celebrations in Moscow, Russia, on Nov. 4, 2017. The National Unity Day marks the liberation of Moscow from Polish invaders in 1612. (Xinhua/Oleg Brusnikin)