Volunteer participants pose naked inside the Stadschouwburg theatre in Belgium during a photo session with US photographer Tunick. Volunteer participants pose naked inside the Stadschouwburg theatre during a photo session with U.S. photographer Spencer Tunick in the northern Belgian city of Bruges May 7, 2005. Tunick on Saturday held photo sessions with hundreds of participants for the opening ceremony of the arts festival "Corpus 05". REUTERS/Peter Maenhoudt Pictures of the month May 2005