Economic collapse in Mongolia has led to a disturbing growth in the number of street children living in poverty and squalor. Fergal Keane meets one nine-year-old boy whose home is a sewer shared with a group of other destitute youngsters. Also, the surprising story of what happened to Nigerian politician Umaru Dikko, who was found drugged in a crate marked "diplomatic baggage" at Stansted airport 11 years ago. The Nigerian government at the time called him their "most wanted fugitive" and accused him of stealing millions of pounds when he was a minister. Now, as Janet Anderson reports, Nigeria's military government is grooming Dikko to be a presidential candidate.