The long journey home for South African freedom fighters

Also in the programme:

More than four million people across West and Central Africa are grappling with the effects of unprecedented flooding. We speak to the NGO Mercy Corps about what needs to be done now to protect those affected; and in the future, to guard against climate shocks.

And we visit Zinder in Niger, where the guardians of the city's Islamic heritage are also warning about the threat of climate change.