Russian Su-24 tactical bombers fly in formation during the Victory Day parade above Red Square in Moscow

Russian Su-24 tactical bombers fly in formation during the Victory Day parade above Red Square 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/Tatyana Makeyeva