On May 11, 1995, Warren Olney hosted, and I produced, a program which turned out to be the last interview with Dr. Jonas Salk, discoverer of the Polio Vaccine. The program was part of our Cable Ace Award-nominated series, "21st Century," which looked at the science of the coming new century. Dr. Salk came into the studio, looked over our questions about the ravages of polio and his discovery, and said he preferred to talk about his current research ... into an AIDS vaccine. -- Les Guthman