Mining giant Rio Tinto faced a protest today from a broad coalition of unions, social and environmental groups from as far afield as Mongolia over its role as a key sponsor and sole provider of gold, silver and bronze for the 2012 Olympic medals.
See http://www.thisislondon.co.uk/business/business-news/protesters-picket-rio-tinto-meeting-over-mines-behind-olympic-medals-7660653.html.