How do you prevent a world war?

The Chief of the Defence Staff says it’s the "most dangerous period" he’s known in his entire military career. And we've all heard the warnings of the potential for direct armed conflict with Russia within 5 years. But what else should we be preparing for?  Kate and Mike are joined by Tobias Ellwood, former Defence Minister, former Chair of the Defence Committee and a former soldier. He's the author of 'Ten Steps to Prevent World War Three.’ We’re also joined by the former Deputy Supreme Allied Commander Europe, General Sir Richard Shirreff, who served 37 years in the British Army.