An estimated 17,000 to 40,000 people from across Europe attended an unauthorized 'free party' on a military firing range near Bourges, central France, starting Friday, despite warnings of unexploded mortars. Interior Minister Laurent Nunez, a Bourges native, visited the site Sunday via gendarmerie helicopter and condemned the event. Organizers protested the government's 'Ripost' bill increasing penalties for undeclared raves; no major incidents reported.