A protester wearing a costume bearing the words Robocop walks among Russian riot police officers after a rally in Moscow on Saturday. Ivan Sekretarev/AP hide caption

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Russian Prime Minister Vladimir Putin at a rally in Moscow on Sunday. He won election to the post he previously held: president. Alexei Nikolsky/AFP/Getty Images hide caption

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A street scene in Ekaterinburg, Russia. David Gilkey/NPR hide caption

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