People attend a ceremony marking the 70th anniversary of the start of the Nanjing Massacre at the Nanjing Massacre Museum, Jiangsu province, December 13, 2007. Activities are held to commemorate the 1937 massacre, when Japanese troops killed more than 300,000 Chinese civilians and captives, raped more than 20,000 and burned down one-third of the urban buildings. (Xinhua)