South Korean riot policemen block former soldiers, trained to infiltrate into North Korea, who are trying to enter the Japanese embassy at an anti-Japan rally in Seoul April 5, 2005. Protesters rallied on Tuesday against new controversial Japanese history textbooks about Japan's military aggression in Asia and its 1910-1945 colonial rule over the Korean peninsula, as well as Japan's sovereignty claims over a group of islets that South Korea refers to as Dokdo and Japan, as Takeshima. REUTERS/Kim Kyung-Hoon PN