Most Americans still drive to work, but biking is growing faster than other mode of commuting. The number of commuters on two wheels grew about 60 percent int he last decade. A new Census Bureau report shows roughly 786,000 Americans are riding their bikes to work, up from just 488,000 in 2000. The increase comes as citites add bike-share programs and lanes to encourage cyclists. Scott Goldberg discusses the surprising list of cities seeing the largest growth.