In this photograph taken on May 30, 2012, Afghan trash collectors search for recyclable items on the street in Pakistan’s port city of Karachi. More than 20,000 children, the vast majority of them Afghans who work for 2 USD a day, collect rubbish dumped by the 18 million residents of Karachi. According to official figures, there are 500,000 Afghans in the city, 80 percent registered as refugees and the rest undocumented or illegal economic migrants. AFP