Schoolchildren participate in a ceremony at the Nanjing Massacre Memorial Hall on the second annual national day of remembrance to commemorate the 80th anniversary of the massacre in Nanjing on December 13, 2017. Sirens blared and thousands of doves were released as Chinese President Xi Jinping presided over a sombre ceremony in Nanjing marking 80 years since the wartime massacre in the city by Japanese troops. / AFP PHOTO / CHANDAN KHANNA (Photo credit should read CHANDAN KHANNA/AFP/Getty Images)
