DARPA's 'Aerial Dragnet' Will Monitor Drones in Cities

In recent years, small unmanned aerial vehicles (UAVs), such as commercial quadcopters and hobby drones, have become less expensive and easier to fly — adding traffic to airspace that's already congested. Drones are also more adaptable for terrorist or military purposes, and because they are currently flying unmonitored, U.S. forces want to be able to quickly detect and identify UAVs, especially in urban areas. A new project launched by the Defense Advanced Research Projects Agency (DARPA)