Tony Blair on Radical Islam

With much of the Middle East in violent conflict, This Week's World explores whether radical Islamist ideology can be confronted using ideas. Former British prime minister and Middle East peace envoy Tony Blair speaks to Emily Maitlis about new ideas to face down so-called Islamic State and the ideas behind it. We review these ideas with Muslim thinkers and former jihadis and report from Iraq, exploring the consequences of western policy and the rise of extremism.