The Clinton Administration gave its approval to guidelines that will allow scientists to use federal money in doing research with stem cells from human embryos. The National Institutes of Health issued the guidelines hoping for breakthroughs in treating diseases like Alzheimer's, Parkinson's, and diabetes. Opponents say it's ethically wrong to use human embryos for such research. But in making his announcement, President Clinton said there could be "potentially staggering benefits" from stem cell research. Joining us on the line to talk about that potential is Catherine Versaillie (ver-SIGH), director of the Stem Cell Institute at the University of Minnesota.