(CBS) With prices like these, maybe it’s time to put some hard thought into what we could be filling up with. The Iranians say they have a solar-powered car. Engineers in the U.S. and Europe say they have tried hydrogen. But, how about air? CBS News correspondent Sheila MacVicar reports.

At their factory in southern France, father-and-son team Guy and Cyril Negre insist air power is no joke.
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