Also how cities are the new battleground of our increasingly urban world: Stephen Graham, author of Cities Under Siege, tells Laurie that from the slums of the global South to the financial districts of the developed world political violence is policed with increasingly military tactics. He claims that the all over the world the city shows more and more features of a war zone. They discuss what he calls the 'new military urbanism' with Melissa Butcher.

Producer: Charlie Taylor.