Igor Barilo/Getty Images Sending power through the air is one of those unicorn projects that feels like it would be magical, if only someone could get it to work. It's such a unicorn that multiple groups are pursuing that very thing, and of course, more than a few of them are devoted to making weapons of war work better. All cynicism aside, that's where we find ourselves today. A team of Chinese researchers built a drone and a ground vehicle that can keep it aloft for just over three hours at an altitude of around 15 meters. The ground vehicle…