In this week's edition: testing begins of a new vaccine against HIV in South Africa, Rwanda launches an investigation into the role French officials may have played in the 1994 genocide; and in Cameroon, authorities are trying to stop people drinking alcohol from plastic bags. Could it bring an end to the HIV epidemic? Scientists say they have high hopes for a new vaccine, as trials get under way in South Africa.

Also, France and Rwanda are at loggerheads once more, as Kigali launches a formal investigation into French officials suspected of involvement in the 1994 genocide.

And whisky in a sachet: we head to Cameroon, a nation facing a burgeoning drink problem.