Diplomacy has so far failed to defuse the crisis in Ukraine and many fear that war is imminent. Gideon discusses the remaining diplomatic possibilities and, if they fail, what a war might look like, with Samuel Charap, a political scientist at the Rand Corporation think-tank in Washington.Clips: Sky News, CBS NewsRead a transcript of this episode on FT.com See acast.com/privacy for privacy and opt-out information.