At Cabora Bassa - a remote gorge in Mozambique - dam is under construction that could change the face of Africa. For Portugal, it is vital - their spending m Africa can only be justified by a Mozambique economic take-off. For the South Africans building it, it is vital as a source of cheap power. For Frelimo, the liberation movement fighting the Portuguese, it is a threat. In the month in which Portuguese Premier Caetano visits Britain to mark 600 years of friendship, David Taylor looks at the massive importance of this project.
Presented by Brian Widlake
With Paul Griffiths and Robert McKenzie