Russian President Putin holds a portrait of his father, war veteran Vladimir Spiridonovich Putin as he takes part in the Immortal Regiment march on the Red Square during the Victory Day celebrations in Moscow

Russian President Vladimir Putin (C) holds a portrait of his father, war veteran Vladimir Spiridonovich Putin as he takes part in the Immortal Regiment march on the Red Square during the Victory Day celebrations in Moscow, Russia, May 9, 2015. Russia marks the 70th anniversary of the end of World War Two in Europe on Saturday with a military parade, showcasing new military hardware at a time when relations with the West have hit lows not seen since the Cold War. REUTERS/Host Photo Agency/RIA Novosti ATTENTION EDITORS — THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS