Unspun World: Why can’t the US and Iran reach a peace deal?

John Simpson, in discussion with the BBC’s unparalleled range of experts across the world, analyses what is preventing the United States and Iran from reaching an agreement to end their conflict, examines the global economic impact of the confrontation, and looks at the growing threat from jihadists in West Africa. Producer: Kate Cornell Executive producer: Benedick Watt Commissioning editors: Silvia Costeloe and Paul Royall