Bhopal legacy: India's athletes urged to boycott games

Campaigners in India are keeping up the pressure for Indian athletes to boycott the London 2012 Olympic games - in opposition to Dow Chemical being one of the Olympic sponsors.

The US company owns Union Carbide, whose Indian subsidiary was responsible for the world's worst industrial disaster in 1984, when the pesticide plant leaked tonnes of lethal chemicals over Bhopal.

Nearly 30 years on, the Bhopal tragedy still provokes deep anger in India, as Andrew North reports.