Russian Orthodox Church Patriarch Alexiy II (L) conducts a service honouring President Dmitry Medvedev and his wife Svetlana in the Assumption Cathedral of Moscow's Kremlin May 7, 2008 after an inauguration ceremony. Medvedev was sworn in as Russian president on Wednesday and just over two hours later nominated his predecessor Vladimir Putin as prime minister, ushering in an unprecedented period of dual rule. [Agencies]