Many of us think of drones as high-tech weapons owned only by a few powerful countries. But the real picture is much messier. This chapter looks at how armed drones have spread to countries, rebel groups, and even individuals—and how that spread brings a cascade of new ethical and safety headaches. From cheap hobbyist devices that can shut down an airport to the danger of an enemy turning your own tactics against you, the spread of unmanned systems is reshaping warfare and public safety in ways we are still learning about.