Children of the victims of 1984 Bhopal gas tragedy, a gas leak from a Union Carbide pesticide plant that killed at least 3,500 people, wear bands as they attend a protest outside prime minister's office (PMO) in New Delhi June 27, 2011. Dozens of children from central Indian city of Bhopal on Monday protested outside PMO demanding medical care, rehabilitation and poison free environment, a media release said. REUTERS/Adnan Abidi (INDIA - Tags: CIVIL UNREST DISASTER ENVIRONMENT)