Nkosazana Dlamini Zuma has had an impressive career. Member of Parliament for the ANC, national executive committee member, former African Union Commission chair, minister of 18 years and doctor. Yet now approaching the end of the presidential leadership race as the first female contender for the ANC's presidency, she remains an enigma. There has been as much meaning in what she doesn’t say in public, as in what she does say. By CARIEN DU PLESSIS.