Night Waves - Future Warfare

Anne McElvoy hosts a special edition looking at the state of warfare in the modern world. Today Western nations find themselves in conflicts with enemy networks, rather than enemy nations, the technology of war has developed to using unmanned aerial vehicles, and our increasing reliance on the internet raises the spectre cyber warfare. Do these developments mean we've entered a new era for warfare? What do they mean for the ethics of conflict in the modern world?