Rise of the machines?

But it could be a real threat, warn researchers at the recent World Economic Forum. Unlike today's drones, which are still controlled by human operators, autonomous weapons could potentially be programmed to select and engage targets on their own. "It was one of the concerns that we itemized last year," Toby Walsh, professor of artificial intelligence (AI) at the school of computer science and engineering at the University of New South Wales, told FoxNews.com. "Most of us believe that we don't have the ability to build ethical robots," he added. "What is especially worrying is that the various militaries around the world will be fielding robots in just a few years, and we don't think anyone will be building ethical robots."