A dark side to Egypt that the authorities don't want foreigners to see: a secretive society of tens of thousands of people literally living in rubbish in a Cairo ghetto overrun by rats and disease. Filmed inside the ghetto where they live with garbage stacked to the roofs of their multi-storey homes, they recycle the rubbish by hand. It's a sight rarely seen by outsiders. This group is unique for another reason. They're part of Muslim Egypt's Christian minority; a community claiming to be besieged by persecution, extremism and a creeping Islamisation in Egypt's security services. This video highlights one the most sensitive issues faced by some of those in Egypt - their decision to convert to Christianity - decision that some Muslims believe should be punishable by death under a strict interpretation of Islamic sharia religious law.