Los Angeles, CA, London, UK - Today’s emerging military technologies—including unmanned aerial vehicles, directed-energy weapons, lethal autonomous robots, and cyber weapons like Stuxnet—raise the prospect of upheavals in military practices so fundamental that they challenge long-established laws of war. Weapons that make their own decisions about targeting and killing humans, for example, have ethical and legal implications obvious and frightening enough to have entered popular culture (for example, in the Terminator films).