MOSCOW, RUSSIA - JULY 31:    Police clash with opposition demonstrators during a protest against government's leadership and policies on July 31, 2009 in Moscow, Russia. As rallies were held around the country at least 18 people were arrested in Moscow on shortly before the start of an unauthorized demonstration against the economic policies of Russian Prime Minister Vladimir Putin. Getty Images logo Getty Images 4 months ago

MOSCOW, RUSSIA - JULY 31: Police clash with opposition demonstrators during a protest against government's leadership and policies on July 31, 2009 in Moscow, Russia. As rallies were held around the country at least 18 people were arrested in Moscow on shortly before the start of an unauthorized demonstration against the economic policies of Russian Prime Minister Vladimir Putin.