Steve Kroft with President elect Obama's first post election interview. This is expected to be one of the most watched shows of the season as Barack Obama talks about his plans for the next four years. He also discusses his cabinet choices. Wife Michelle is also interviewed. In the second story, Lesley Stahl re visits one of the most amazing musical savants known. Rex Lewis-Clack's life was changed when his parents found that their son, born blind and mentally impaired, was extraordinarily gifted. Now, at 13, see how far music and his gift has taken him.