Drone warfare: from soldiering to assassination? Laurie Taylor talks to the US philosopher, Laurie Calhoun, about her study of remote controlled killing. Has self defence become naked aggression in the Drone age. She argues that 'black ops' are now standard operating proceedure. Professor David Galbreath, Professor of International Security at the University of Bath, offers an alternative perspective. Also, the precarity of personal trainers. Geraint Harvey, Senior Lecturer in Industrial Relations at the University of Birmingham, discusses a new study which claims that their working conditions represent a new form of hyper flexible and insecure work. Producer: Jayne Egerton.