ecklund for months. >> susser: hello, is dan ecklund there please? october, we asked the sussers to contact dr. ecklund. ecklund sent them a letter which offered the blind and paralyzed adam the possibility of an improved level of consciousness, improved ability to see, to speak, to stand and walk. what can stem cells really do today? we asked a scientist who's doing some of the world's most advanced studies in stem cells, dr. joanne kurtzberg. >> kurtzberg: i believe stem cells have a lot of promise. but we are way at the infancy. because real stem cells are very difficult to control as therapy. i personally think we're ten years away from seeing real cell therapies that are working and are safe, but i do believe it will come. >> pelley: dr. kurtzberg is a physician and the chief scientific officer of a stem cell research program at duke university. she advises the federal government and is the co- director of this multimillion- dollar laboratory which works with stem cells harvested from umbilical cord blood. dr. kurtzberg told us there is no eviden