Dutch Princess Maxima (L), Dutch Queen Beatrix (2ndR), her lady-in-waiting (2ndL) and Prince Willem-Alexander walk as they leave a wreath-laying ceremony by the national monument during the commemoration of the World War II's dead on May 4, 2010, at the Dam in Amsterdam. Several people were injured in a stampede today at a World War II commemoration in Amsterdam after which two men were arrested.   AFP PHOTO/ ANP/ MARCELL ANTONISSE     ***NETHERLANDS OUT - BELGIUM OUT*** (Photo credit should read MARCEL ANTONISSE/AFP/Getty Images)