In an historic first, a president faces charges at the International Criminal Court

For the first time in the history of the world, a sitting head of state is attending his trial for crimes against humanity. The head of state is Kenya President Uhuru Kenyatta. The venue is the International Criminal Court. The stakes are high, but the case against him is troubled. Mark speaks with Mark Kersten of the LSE and SOAS, and author of the blog Justice in Conflict about the case against Kenyatta. They discuss its significance the ICC, and why it's exceedingly difficult to build a case against a serving head of state.