BAD MEDICINE - Drug company whistle-blower Cheryl Eckard tells Scott Pelley about her experience trying to fix problems at a pharmaceutical factory that made her a key figure in a federal lawsuit and a multimillionaire. Denise Schrier Cetta is the producer. WYNTON - Jazz missionary Wynton Marsalis shares his love of America's most distinctive art form by taking his Jazz at Lincoln Center Orchestra around the world. Morley Safer tags along as Marsalis and his musicians make the scene in London and then go to Havana for a spicy Afro-Cuban musical treat. David Browning is the producer. THIS IS A DOUBLE-LENGTH SEGMENT.