Netherlands, Nijmegen, 18 july 2006. The biggest 4-day walking event in the world, The Vierdaagse, has been cancelled as two participants died of high temperature. The coming three days are again high temperatures expected. medical aid for one of the walkers. Hitte velt vierdaagselopers, Rode Kruis medewerkers vervoeren onwel geworden loper op brancard. Foto: Bert Beelen/Hollandse Hoogte