MOSCOW, RUSSIA - APRIL 15: Russian Prime Minister Vladimir Putin (2R), Moscow Mayor Sergey Sobyanin (R), President Dmitry Medvedev (L) and his wife Svetlana Medvedeva (C) attend an Easter Service in the Christ the Saviour Cathedral on April 15, 2012 in Moscow, Russia. Easter Mass in the Russian Orthodox church is considered the most important religious celebration of the year. (Photo by Sasha Mordovets/Getty Images)
MOSCOW, RUSSIA - APRIL 15: Russian Prime Minister Vladimir Putin (2R), Moscow Mayor Sergey Sobyanin (R), President Dmitry Medvedev (L) and his wife Svetlana Medvedeva (C) attend an Easter Service in the Christ the Saviour Cathedral on April 15, 2012 in Moscow, Russia. Easter Mass in the Russian Orthodox church is considered the most important religious celebration of the year. (Photo by Sasha Mordovets/Getty Images)
MOSCOW, RUSSIA - APRIL 15: Russian Prime Minister Vladimir Putin (R), President Dmitry Medvedev (L) and his wife Svetlana Medvedeva (C) attend an Easter Service in the Christ the Savior Cathedral on April 15, 2012 in Moscow, Russia. Easter Mass in the Russian Orthodox church is considered the most important religious celebration of the year. (Photo by Sasha Mordovets/Getty Images)
MOSCOW, RUSSIA - APRIL 15: Russian Prime Minister Vladimir Putin (R), President Dmitry Medvedev (L) and his wife Svetlana Medvedeva (C) attend an Easter Service in the Christ the Savior Cathedral on April 15, 2012 in Moscow, Russia. Easter Mass in the Russian Orthodox church is considered the most important religious celebration of the year. (Photo by Sasha Mordovets/Getty Images)
MOSCOW, RUSSIA- APRIL 12: Prime Minister Dmitry Medvedev of Russia, Svetlana Medvedeva and President Vladimir Putin of Russia attend the Orthodox Easter service at the Christ the Saviour Cathedral April 12, 2015 in Moscow, Russia. Orthodox Christian believers mark the Holy Week of Easter in celebration of the crucifixion and resurrection of Jesus Christ. (Photo by Sasha Mordovets/Getty Images)
