The revolutionary medical breakthrough of gene therapy is much more than the treatment of disease by altering human DNA -- it offers the intriguing possibility of creating "designer children." Today's experts debate the benefits of and difference between genetic therapy and genetic enhancement, and the ethical impact of altering human evolution. Joining host Robert Lawrence Kuhn are gene therapist French Anderson; evolutionary biologist Francisco Ayala; best-selling author and surgeon Sherwin Nuland; biophysicist Gregory Stock; and neuroscientist Allan Tobin.