Doves fly above Chinese paramilitary policemen as they gather to mourn for the victims of 1937 Nanjing Massacre at the Nanjing Massacre Memorial Hall in Nanjing in east China's Jiangsu province Friday, Dec. 13, 2013. Nanjing on Friday marked 76 years after a bloody invasion by the Japanese imperial army that remains as one of the most sensitive friction points in the shared history of two Asian powers. (AP Photo) CHINA OUT