Four cab drivers cause gridlock in Olympic Park protest . British Medical Association demonstrate outside Olympic park . BMA campaigners claim Dow has responsibility for 1984 Bhopal gas leak ##s . Dow denies claims , buying Union Carbide two months after disaster .
London cab drivers cause gridlock in Olympic lanes protest . Bhopal Medical Association demonstrate outside Olympic park . BMA campaigners claim Dow has responsibility for 1984 Bhopal gas leak tragedy . Dow denies claims , buying Union Carbide 16 years after disaster .