Chinese police officers and local residents mark a minute of silence as sirens blare to commemorate victims of Nanjing massacre in Nanjing in China's eastern Jiangsu province on December 13, 2017. China marked the 80th anniversary of the Nanjing massacre by Japanese troops on December 13, an enduring source of bad blood as present-day rivalry between the two countries keeps a spotlight on historical animosities. / AFP PHOTO / - / China OUT (Photo credit should read -/AFP/Getty Images)
