Policemen tackle a demonstrator on the ground during a protest near the Japanese consulate on the 81st anniversary of Japan's invasion of China, in Shanghai September 18, 2012. Anti-Japan protests reignited across China on Tuesday, forcing Japanese firms in the country to suspend operations, as a crisis over a territorial dispute escalated on the day Chinese commemorated Japan's 1931 occupation of its giant neighbour. REUTERS/Aly Song (CHINA - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY | Foto: Reuters