The large-scale anti-Japanese protests that swept across China over the weekend are likely to reach a crescendo today, as Sept. 18 marks the official Chinese anniversary of Japan’s invasion of China in 1931. The wave of public demonstrations was triggered by Tokyo’s announcement last week that it would purchase the disputed Senkaku Islands, known as Diaoyu in China, from a private Japanese owner. The islands are claimed by China and Taiwan but controlled by Japan. U.S. Defense Secretary Leon Panetta, who is on a week-long tour in Asia, and other American officials have expressed concern that the escalating dispute between [...]