People attend the commemoration marking the 70th anniversary of World War II victory in Europe in Vilnius, Lithuania, on May 8, 2015. (Xinhua/Alfredas Pliadis)

People attend the commemoration marking the 70th anniversary of World War II victory in Europe in Vilnius, Lithuania, on May 8, 2015. (Xinhua/Alfredas Pliadis)

People attend the commemoration marking the 70th anniversary of World War II victory in Europe in Vilnius, Lithuania, on May 8, 2015. (Xinhua/Alfredas Pliadis)

Lithuania's President Dalia Grybauskaite attends the commemoration marking the 70th anniversary of World War II victory in Europe in Vilnius, Lithuania, on May 8, 2015. (Xinhua/Alfredas Pliadis)

People attend the commemoration marking the 70th anniversary of World War II victory in Europe in Vilnius, Lithuania, on May 8, 2015. (Xinhua/Alfredas Pliadis)

A veteran attends the commemoration marking the 70th anniversary of World War II victory in Europe in Vilnius, Lithuania, on May 8, 2015. (Xinhua/Alfredas Pliadis)

Guard of Honour are seen in front of the War Memorial during a commemoration event of the 70th anniversary of World War II victory in Europe held in the Central Military Cemetery of Royal Romanian Amry and Red Army in Zvolen, central Slovakia, May 8, 2015. (Xinhua/Erik Adamson)

Slovak President Andrej Kiska attends a commemoration event of the 70th anniversary of World War II victory in Europe held in the Central Military Cemetery of Royal Romanian Amry and Red Army in Zvolen, central Slovakia, May 8, 2015. (Xinhua/Erik Adamson)

Slovak President Andrej Kiska (3rd R) attends a commemoration event of the 70th anniversary of World War II victory in Europe held in the Central Military Cemetery of Royal Romanian Amry and Red Army in Zvolen, central Slovakia, May 8, 2015. (Xinhua/Erik Adamson)

People attend a commemorative event to mark the 70th anniversary of World War II victory in Europe in downtown Ottawa, Canada, May 8, 2015. (Xinhua/Li Baodong) 10

People attend a commemorative event to mark the 70th anniversary of World War II victory in Europe in downtown Ottawa, Canada, May 8, 2015. (Xinhua/Li Baodong) 11

People attend a commemorative event to mark the 70th anniversary of World War II victory in Europe in downtown Ottawa, Canada, May 8, 2015. (Xinhua/Li Baodong) 12

World War II vintage aircraft fly near the Washington Monument in Washington D.C., capital of the , May 8, 2015. Diverse arrays of US World War II aircraft flew over the capital Washington D.C. Friday, commemorating the 70th anniversary of World War II victory in Europe. (Xinhua/Yin Bogu) 13

World War II vintage aircraft fly near the Washington Monument in Washington D.C., capital of the United States, May 8, 2015. Diverse arrays of US World War II aircraft flew over the capital Washington D.C. Friday, commemorating the 70th anniversary of World War II victory in Europe. (Xinhua/Yin Bogu) 14

World War II vintage aircraft fly over Washington D.C., capital of the United States, May 8, 2015. Diverse arrays of US World War II aircraft flew over the capital Washington D.C. Friday, commemorating the 70th anniversary of World War II victory in Europe. (Xinhua/Lei Bosong) 15

British Prime Minister , outgoing Liberal Democratic Party leader Nick Clegg and outgoing opposition Labour Party leader Ed Miliband (Central Row, from R to L), attend a VE Day service of remembrance at the Cenotaph on Whitehall to commemorate the 70th anniversary of the end of the World War II in Europe in London, Great Britain, on May 8, 2015. (Xinhua/Han Yan) 16

Military band perform during a VE Day service of remembrance at the Cenotaph on Whitehall to commemorate the 70th anniversary of the end of the World War II in Europe in London, Great Britain, on May 8, 2015. (Xinhua/Han Yan) 17

Military soldiers take part in a VE Day service of remembrance at the Cenotaph on Whitehall to commemorate the 70th anniversary of the end of the World War II in Europe in London, Great Britain, on May 8, 2015. (Xinhua/Han Yan) 18

Roses are seen inside a howitzwer model during a memorial ceremony marking the 70th anniversary of the end of World War II at the German-Russian Museum in Berlin, Germany, May 8, 2015. (Xinhua/Zhang Fan) 19

A visitor presents flowers near a tank model during a memorial ceremony marking the 70th anniversary of the end of World War II at the German-Russian Museum in Berlin, Germany, May 8, 2015. (Xinhua/Zhang Fan) 20