Members of student groups and activists of social organizations participate in a candle light vigil to express solidarity with the Bhopal gas tragedy survivors in Bangalore, India, Saturday, June 21, 2008. The catastrophic December 1984 gas leak from the Bhopal pesticide plant in central India killed at least 10,000 people and affected about 550,000 others. The survivors demand a special empowered committee for rehabilitation and legal action against Dow Chemical and Union Carbide. (AP)