Nigeria's Ngozi Okonjo-Iweala becomes WTO's new leader

In tonight's edition: Nigeria's Ngozi Okonjo-Iweala makes history by becoming the first woman and first African to head the World Trade Organization. We take a look back at her career so far. In South Africa, former president Jacob Zuma could be jailed for his refusal to appear before an anti-graft inquiry. And DR Congo's President Felix Tshisekedi takes a further step to distance himself from his predecessor Joseph Kabila by naming a new prime minister following a political power struggle.