Designed to fly at Mach 6 and beyond, the SR-72 is Lockheed Martin’s next-generation unmanned spy plane—and potential strike weapon - aimed at outpacing enemy defenses with blistering speed. Building ...

A number of high-profile drone espionage incidents have alarmed European NATO members—but it is not yet clear which adversary, if any, is responsible. A year ago, a wave of unmanned aerial vehicle ...