Anti-Japan War Veterans pose for a group photo at the Nanjing Massacre Memorial Hall in Nanjing, capital of east China's Jiangsu Province, July 7, 2014. Sixteen veterans who attended the Chinese People's War of Resistance Against Japanese Aggressions (1937-1945), or the Second Sino-Japanese War, visited the Nanjing Massacre Memorial Hall on Monday to mark the 77th anniversary of the war's outbreak on July 7, 1937. The Nanjing Massacre was a six-week long atrocity committed by the Japanese invaders in Nanjing starting from Dec. 13, 1937 that killed more than 300,000 Chinese citizens. (Xinhua/Han Yuqing)