Demonstrators shroud themselves during a protest against Dow Chemicals sponsorship of the London 2012 Olympic Stadium, near to where the International Olympic Committee press conference for the London 2012 Olympics games is being held in London, Friday March 30, 2012. An industrial gas leak accident at the Union Carbide facility on December 1984 caused the deaths of around 3,000 people in Bhopal, India, and the protesters are demonstrating against the Olympic stadium sponsorship by Dow Chemicals, who now own Union Carbide. (AP Photo/Alastair Grant )