Why has Air Tanzania been banned from EU Airspace?

Air Tanzania, has been added to the European Union Aviation Safety Agency's (EASA) list of airlines that have been restricted from operating within the European Union. So what are the shortcomings? We sought answers from an aerospace expert. Did you know that South Africa’s unique succulent plants are under threat from poachers? We have a first-hand account from our correspondent who has been to the remote biodiversity hotspot that has become the hub of an illegal trade. And new research, that included delving into the Vatican archives, has revealed how an Angolan prince, became a key figure in the fight against the trans-Atlantic slave trade, a century before its abolition.Presenter: Charles Gitonga Producers: Rob Wilson, Bella Hassan and Stefania Okereke in London Senior Producer: Patricia Whitehorne Technical Producer: Francesca Dunne Editors: Andre Lombard and Alice Muthengi