Academic teams, tech startups and automotive companies are putting high-profile efforts into driverless cars, and gaining plenty of headlines. But autonomous and unmanned systems are already patrolling the skies and oceans in addition to being tested on our streets and highways. It’s already past time to be discussing the security implications and vulnerabilities of these machines which operate with delayed, remote supervisory control or without a human in the loop at all. The USA gets most of the driverless vehicle attention, but pioneering testing of autonomous ground vehicles is currently being performed in Europe, even right here in Sweden. All trends indicate that these systems collectively (including supervised driver-assist modes) are at an inflection point that will bring them rapidly into common usage. Security researchers and professionals therefore need to be aware of the capabilities and vulnerabilities of these systems and their components.