that is not good for the normal chipes. >> china has broken so many economic rules with over 30 years of yuss precedented growth, perhaps the lending boom won't be so bad. normally the rules of gravity apply. what goes up must eventually come down. that is our report there on china's building boom and whether it could lead to bust. >> for anyone who has been anticipated a future often seen in science fiction movies with robots waiting on humans, you could be waiting a while. the next generation of robots could be more like smaller creatures. here is our report from chicago. >> this is obviously one who can be relied upon not to step on his partner's feet. >> in the 1950's this is how we imagined robots would be like in the future. but 60 years on, this is how they have turned out. it looks like a toy car, but actually it is an intelligent robot that can see and learn. it is navigating its way through this obstacle course all on its own. but here is what it is based on. the research team spent several weeks studying it in spain. based on what they learned, this is what they built, a ro