Terror groups and separatists run riot in the sprawling region, and France has had some success in keeping the peace. But how, and when, to draw down its troops? Ngozi Okonjo-Iweala, the World Trade Organisation’s history-making new leader, has quite the task ahead to rebuild trust in and among the institution’s members. And the worrying shifts in subsea soundscapes. Additional audio courtesy Jana Winderen. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer