Zapping drone swarms into submission

DETROIT—Defense startup Epirus has secured a new Army contract to deliver a pair of high-powered microwave systems that can make a swarm of drones fall from the sky, following years of prototypes and recent tests in the Indo-Pacific. Military use of the technology—which can stun anything with a computer chip in its tracks—to counter unmanned aerial systems comes as global conflicts are demonstrating how consequential drones can be on the battlefield and at home.