Human Beings Testing News Today

Administration is considering whether to allow human beings testing. the fda is now holding meetings to discuss the scientific issues around this whole procedure. of course, its also raising many ethical questions. and some critics say it could lead to so-called designer babies. faith gallagher with more on that age em live from our west coast news hub. how does this procedure work exactly? >> reporter: the jean theyre talking about is mitochondrial dna if its defective can lead to blindness and...