Russian President Vladimir Putin (4th R), Mongolia's President Tsakhiagiin Elbegdorj (4th R, back), Kazakhstan's President Nursultan Nazarbayev (5th R), Venezuela's President Nicolas Maduro (4th R), China's President Xi Jinping (3rd R) and other officials take part in a wreath laying ceremony at the Tomb of the Unknown Soldier on the Victory Day by the Kremlin walls in central Moscow, Russia, May 9, 2015. (Photo by Reuters/Host Photo Agency/RIA Novosti)
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