People dance as they attend a demonstration on National Unity Day in Moscow November 4, 2014. Russia marks National Unity Day on November 4 to celebrate the defeat of Polish invaders in 1612. (Photo by Sergei Karpukhin/Reuters)

A boy salutes as he sits on his grandfather's shoulders while Russian communists attend a demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Sergei Karpukhin/Reuters)

A Russian communist supporter carries a portrait of Soviet dictator Josef Stalin as people attend a demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Sergei Karpukhin/Reuters)

Russian President Vladimir Putin, center, speaks with the confessional leaders during a ceremony at the Red Square in Moscow on Tuesday, November 4, 2014, during the National Unity Day, a national holiday which this year marks the 402th anniversary of the 1612 expulsion of Polish occupiers from the Kremlin. (Photo by Vasily Maximov/AP Photo)

Russian nationalist lights flare during a march in Moscow on Tuesday, November 4, 2014. Russian nationalists will hold their traditional “Russian March” in Moscow's Lyublino neighborhood to celebrate People's Unity Day. (Photo by Pavel Golovkin/AP Photo)

Russian nationalists carry flags of Donetsk People's Republic during a march in support of pro-Russian separatists fighting with Ukrainian government forces in eastern Ukraine in Moscow to mark People's Unity Day, a public holiday in Russia, on Tuesday, November 4, 2014. (Photo by Alexander Zemlianichenko/AP Photo)

A boy holds a toy rifle during a Russian nationalist march in support of pro-Russian separatists fighting with Ukrainian government forces in eastern Ukraine in Moscow to mark People's Unity Day, a public holiday in Russia, on Tuesday November 4, 2014. (Photo by Alexander Zemlianichenko/AP Photo)

Russian police detain a nationalist activist during the Russian March in Moscow on Tuesday, November 4, 2014. (Photo by Pavel Golovkin/AP Photo)

Russian nationalists carry Orthodox icons during a march in support of pro-Russian separatists fighting with Ukrainian government forces in eastern Ukraine in Moscow to mark People's Unity Day, a public holiday in Russia, on Tuesday, November 4, 2014. (Photo by Alexander Zemlianichenko/AP Photo)

Russian nationalists shout slogans during a “Russian March” demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Maxim Shemetov/Reuters)

Russian nationalists attend a “Russian March” demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Maxim Shemetov/Reuters)

Russian nationalists attend a “Russian March” demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Maxim Shemetov/Reuters)

Police officers detain a protester during a “Russian March” demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Maxim Shemetov/Reuters)

Police officers detain protesters during a “Russian March” demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Maxim Shemetov/Reuters)

People walk with flags and posters as they attend a demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Sergei Karpukhin/Reuters)

Dancers perform in front of the walking demonstrators on National Unity Day in Moscow November 4, 2014. (Photo by Sergei Karpukhin/Reuters)

A man carries a portrait of Russia's President Vladimir Putin as he attends a demonstration on National Unity Day in Moscow November 4, 2014. (Photo by Sergei Karpukhin/Reuters)

A man carries a portrait of Russia's President Vladimir Putin as he attends a demonstration on National Unity Day in Moscow November 4, 2014. The sign reads: “I want in to the USSR”. (Photo by Sergei Karpukhin/Reuters)

A woman shouts slogans during a demonstration on National Unity Day in Moscow November 4, 2014. The sign reads, “Russia and Crimea are together forever”. (Photo by Sergei Karpukhin/Reuters)

People of pro-government groups, with Russian flags, dance marching through downtown Moscow to mark People s Unity Day, a public holiday, in Russia, on Tuesday, November 4, 2014. (Photo by Ivan Sekretarev/AP Photo)