Russia shot down one of its own drones — a large and stealthy S-70 — after it flew uncontrolled into Ukrainian territory in early October, sparking speculation about how Moscow lost control of this valuable asset so publicly. It’s an unforced error that will be keenly felt in Moscow, whose high ambitions for producing its own drones have been slow to take flight. Given shortfalls in manpower, munitions, artillery, and aircraft, Russia has signaled its belief that uncrewed systems could be trans