Iran’s capture of a US military underwater drone gives Tehran an opportunity to study and potentially reverse-engineer the vessel, delivering a setback for the Pentagon and drone maker Anduril. The US military and Anduril have downplayed the significance of the drone falling into Iranian hands. The vessel, a Dive-LD autonomous underwater vehicle designed for long-range surveillance and other undersea missions, is among a new ‌generation of military drones intended to operate for days with little...