Sudan's army retake Khartoum

Sudan's army has chased out the paramilitary Rapid Support Forces from the capital city, Khartoum - but how significant is this development, and could it signal a major breakthough in the two year war? We hear from Mohanad Hashim, who is from the capital and has been following the war since it began. He has just returned from a trip there. Why has Burkina Faso’s military rulers disbanded the country’s main journalists’ association and detained its leaders?And could Africa lead the way in pioneering plant-based vaccines? We hear from a leading immunologist on how she and her team are developing plant-based immunisation technology.Presenter: Audrey Brown Technical Producer: Jonathan Greer Producers: Stefania Okereke, Amie Liebowitz and Elizabeth Kazibure in London. Daniel Dadzie in Accra Senior Journalist: Patricia Whitehorne Editors: Andre Lombard and Alice Muthengi