One of the defense industry’s loudest advocates in Silicon Valley, the billionaire has been planning a covert venture inspired by Ukraine’s use of drones on the battlefield, with the help of Google alum Sebastian Thrun. By Sarah Emerson and Richard Nieva, Forbes Staff Ex-Google CEO Eric Schmidt has been quietly plotting a new defense tech effort: a stealth military drone project, four sources with knowledge of the effort told Forbes. The project’s existence has not been previously reported and i...