The Valkyrie XQ-58A is a combat drone designed to deliver weapons or assist fighter jets — using artificial intelligence. The prototype has been in development for years and is able to travel 3,000 miles at an altitude of up to 45,000 ft. Experts now say this unmanned vehicle could play a role in a multi-billion-dollar U.S. military effort to use AI to expand its assets to keep up with increasingly advanced adversaries like China. WSJ looks at how the Valkyrie is built for stealth and how it could fit in the U.S. military’s plans to establish a fleet of AI systems. 0:00 Valkyrie drones0:58 Specs4:50 Utility and cost6:57 Future development