A government-sponsored roundtable concerning corporate responsibility of Canadian mining companies operating in developing countries was subject to media restrictions yesterday, even as industry and watchdog groups urged "transparency and truth."...John Ruggie, the United Nations special representative on the issue of human rights and transnational corporations, made an hour-long presentation...[A]ccording to the Canadian Network on Corporate Accountability, mining firms "have been implicated in well-documented cases of human rights violations and environmental disasters abroad," including toxic dumping and forcible displacement of indigenous peoples. [refers to Tournigan Gold Corp.]