The Oil Money at the Heart of So-Called Islamic State

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So-called Islamic State has managed to hold onto much of the territory it has captured in Iraq and Syria, despite coming under fierce ground and air attack in recent months. We ask if it's the militants' control over oil that lies at the heart of its success. We're joined by Sam Jones, Defence and Security editor at the Financial Times which has just carried out an investigation into how IS uses oil revenues to sustain itself. Robots and smart computers are starting to find their way into care homes and schools. They're more manageable than pets and more patient than humans, but can they really enhance the care and education that people receive? The BBC's Hugh Pym has been finding out. And 15 million Americans tuned in to watch the first Democrat debate, but who came out on top? Plus, film-maker Vicky Mohiedeen tells us about her three months in North Korea and what it was like being involved in setting up a photography exhibition there. From Washington, we are joined by professor Peter Morici, from the University of Maryland. (Photo: A picture taken from the hill village of Buqaata shows flames and smoke from alleged shelling by Syrian government forces on Islamic State positions. Credit: AFP/Getty Images)