The leader of Africa's strongest economy is visiting one of the most crippled economies in the continent just next door.
South Africa's Jacob Zuma and Robert Mugabe, the president of Zimbabwe will meet in the next few hours.
Harare desperately needs more aid from its ally.
And South Africa needs its neighbour to resolve its political battles and stop the flow of millions of refugees over the border.
Sudan's governemnt has accused Darfur's largest refugee camp of harbouring rebel fighters. The Kalma camp is the only one that is permanently protected by United Nations and African Union forces, but residents fear they may be driven out as the military threatens to take action. Al Jazeera's Hoda Abdel-Hamid reports from the camp.