In Africa's biggest, dirtiest slum, on the edge of the Kenyan capital of Nairobi, four boys huddle together, wrapped in whatever newspaper or cardboard they can scavenge. Each has his own reason for trying to leave. In the second of two programmes, Andrew Harding meets the cub scouts, vigilantes and others trapped in a life of poverty and finds out whether it's ever possible to escape the slum.
Producer Sue Ellis Repeated on Saturday at 7.45pm