Demonstrators prepare to burn portraits of India's Prime Minister Manmohan Singh and Rahul Gandhi, a lawmaker and son of India's ruling Congress party chief Sonia Gandhi, during a protest in the western Indian city of Ahmedabad December 29, 2012. A woman whose gang rape sparked protests and a national debate about violence against women in India died of her injuries on Saturday, prompting a security lockdown in New Delhi and an acknowledgement from India's prime minister that social change is needed.