Watch NASA prepare for our flying-car future

Instead of taking a bus or train to work, what about a flying car?  A Nova TV special, The Great Electric Airplane Race, airing Wednesday night on PBS, explores the possibility of using autonomous, battery-powered flight for commuting or taxi trips.  As part of his research into electric flight, reporter Miles O'Brien visited NASA's Ames Research Center and hopped into its 10-story vertical motion simulator to see what it would be like to fly around San Francisco in one of these vehicles.  El...