On BioTech Nation, Dr. Moira Gunn speaks with Dr. Mahendra Rao, the Vice President of Research in Regenerative Medicine and Stem Cell Technologies for Invitrogen. He'll tell us how a stem cell line dies out, and what this means for the Presidential Stem Cell Lines, the only ones approved for federal funding. Then on the BioIssue of the Week, we'll find out why the 2004 California Stem Cell Initiative appears to be in limbo.