Google is unveiling its own prototype of a self-driving car in which there's no steering wheel or pedals. Instead, the electric-powered car is driven solely through computers and sensors. The only manual controls are a stop/go button and an emergency button. Chris Urmson, director of Google's self-driving project said in a blog post that safety was the most important aspect of designing the prototype. He says the self-driving cars have sensors that remove blind spots and are able to detect objects that are more than two football fields away. The first vehicles have speed capped at 25 miles per hour. Inside, just two seats with seatbelts and a screen that show the route.