NASA's Safeguard Tech Stops Trespassing Drones Without Touching Them

In the most nightmarish drone scenarios, one of the little whirlybirds flies into an airliner, or wanders into military airspace, or swoops down on the White House. At best, such things are mild annoyances. At worst, they pose a grave threat to safety and security. The sky is a big, open place, with a great many no-go zones that aren't clearly delineated. That makes it easy for a drone, or its pilot, to cause trouble.