Two decades ago today, 40 tons of poisonous gas leaked out of a pesticide factory owned by Union Carbide Company in Bhopal, India. According to official estimates, some 15,000 people died that night and in the following months. Doctors say many who were exposed to the gas will continue to suffer health consequences for the rest of their lives. But as Miranda Kennedy reports from Bhopal, some survivors have used the compensation they received from the company to start sustainable economic programs.