A new report says traffic in the U.S. is worse than it's been in years. But some say there are reasons to be optimistic. For this month's Environmental Outlook: How revitalized urban centers and new modes of transportation are changing how we get around our cities.
Republican Senate leader Bill Frist broke with President Bush Friday on the stem cell debate, saying he would support expanded federal funding for stem cell research. Diane and her guests talk about the latest developments in the ethical, scientific and political debate over stem cell research.
- Fr. Tad Pacholczyk neuroscientist and director of education at the National Catholic Bioethics Center
- Dr. John Gearhart Director, Institute for Regenerative Medicine, at the University of Pennsylvania
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