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Us, thanks. gregg: part robot, part human. it could be the car of the future, and claudia cowan is catching a ride. she's got the story from palo alto, california. claudia? >> reporter: hey, gregg, that's right. it's a prototype audi race car that can go 130 miles per hour without anybody driving it. it is a wild ride in the name of science, so buckle up because you're coming along right after this break. who need

Gregg, how much should the government do, and when do you let the free market sort itself out and when does government jump in to direct that process? gregg: jim angle live in washington, thanks very much. jane: mitt romney is a small group of republican front runners in the 2012 presidential race. he's also an author, and he's on a book tour that just happens to take him through some states that would be crucial to getting him the nomination. steve brown is in des moines, iowa, where we expect to see the governor arrive at any moment. he's been very critical of this health care reform bill, b...

And what we see in that enormous expansion. >> i think obama believes that government needs to have a bigger role in the economy. he thinks that that's better for america. >> reporter: but defenders of the administration say it was necessity brought on by economic problems one after another that demanded federal action to avoid prolonged suffering. listen. >> no. the goal is not to exercise control over the economy, the goal is to help people who don't have jobs, are in danger of losing their homes and can't have access, don't have access to health care. >> it looks like we have an activist go...

Health care thing he's going to have to square that away with republicans and conservatives if he hopes to land that. jane: steve, romney came up short in '08, of course, in the iowa caucuses. does that hurt him, help him? how does he view that? >> reporter: well, here's the beautiful thing about that. he did spend a lot of money and did come up short, so that's the negative part, but he's very familiar here in iowa, so he won't have to spend theory as much to become familiar, he's already a known quantity here. and he will not have the burden of expectation that mike huckabee would have. he w...

The car being able to handle better in critical situations as well as the convenience factor of being able to sit in a traffic jam and letting the car follow the car in front of you. i think we're okay. so have you tested yet? >> that's just fine. >> reporter: you can actually feel the car making critical decisions, accelerating through the straightaway, figuring out when to brake to take the turn as fast as possible and making corrections to stay stable. >> in conditions where, for example, you're hitting a patch of ice or things where really you don't expect to hit all the time, you want the...