Chile's economy is one of the strongest in Latin America, but Saturday's earthquake has revealed the country's social fault lines, where the poorest residents feel insecure and marginalised.<br /><br />In Concepcion, the country's second largest city and the closest to the epicentre, many people are still waiting for aid to be delivered.<br /><br />Al Jazeera's Lucia Newman finds out why some have resorted to ransacking supermarkets. (Mar 4, 2010)