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)

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)

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)

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)

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)

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)

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)

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)

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)