On the second leg of his illuminating journey across Africa, Jonathan Dimbleby travels 2000 miles through East Africa's Rift Valley.
Starting in Ethiopia where he was the first journalist to report the 1973 famine, Dimbleby discovers the great strides being made to safeguard the country from future catastrophes.
In Kenya he finds out how mobile phones are revolutionising small businesses and even the lives of Maasai tribes.
In Tanzania he joins in a football match with the judges and guards of Africa's own Human Rights Commission and meets the street kids in Dar-es-Salaam who are building an international profile for their music.
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