(L-R) Netherlands' Crown Prince Willem-Alexander, Queen Paola of Belgium, King Albert II of Belgium and Princess Maxima of Netherlands, attend on March 22, 2012 at the Sint-Pieters church in Leuven, the funeral service for the seven children from Heverlee, who were killed in the March 13 bus crash in Switzerland. Twenty-eight people were killed in the crash in a tunnel in Sierre, southern Switzerland, including 22 children from two schools in Lommel and Heverlee on their way home from a ski vacation. AFP PHOTO / BELGA / YORICK JANSENS   ***BELGIUM OUT*** (Photo credit should read YORICK JANSENS/AFP/Getty Images)