 We have cars on the road in Pittsburgh. They are driving themselves. There is a safety driver behind the wheel, just in case, to make sure that things go well. So we're in the early to middle stages of the development of software that can drive cars. How is that different from Google or Tesla, probably, which is more hardware? Well, look, I think Google's been working on this for eight years. And there's a reason. A million people die every year in cars from human error. People making mistakes when they're driving. And there's tens of millions of people get injured. And then think of the trillions of hours that we spend behind the wheel driving. And so there's a huge, huge positive impact to society when driverless cars become a thing.