The enemy drone whined in the distance. The Interceptor, a drone-hunting machine from Silicon Valley startup Airspace Systems, slinked off its launch pad and dashed away in hot pursuit.
The hunter twisted through the air to avoid trees, homed in on its target, fired a Kevlar net to capture it, and then carried the rogue drone back to its base like a bald eagle with a kill.
Airspace is among some 70 companies working on counter-drone systems as small consumer and commercial drones proliferate. But unlike others, it aims to catch drones instead of disabling them or shooting them down.
A demonstration at Airspace headquarters in San Leandro, California, showed a compact aircraft just a few feet wide, yet capable of sophisticated, autonomous navigation and accurate targeting of a drone in motion.
It is still early days in the drone-defense business.