15:06HARDtalkRiek Machar, Former Vice President of South SudanBBC World Service Duration: 23 minutes Wed 19th Oct 2016, 15:06 on BBC World Service AustralasiaAvailable for over a yearListen nowHas South Sudan been betrayed by its leaders? Show more GenresNewsFormatsMagazines & ReviewsBrandHARDtalk Source: BBC Online