it was here, in vienna's city park, in the kursalon, where the "waltz king" himself directed wildly popularoncerts in the late 1800s. and the tradition continues to the delight of music lovers from around the world. [ "the blue danube" plays ] >> explore new worlds and new ideas through programs like this made available for everyone through contributions to your pbs station from viewers like you. thank you. >> the effects of unmanaged stress are a major risk factor in almost every serious modern disease, including heart disease, stroke, high blood pressure, diabetes, and even dementia. but it doesn't have to be that way. >> announcer: dr. martin rossman is a clinical faculty member at the university of california medical school and a pioneer in the study of the healing power of the mind. >> mind-body medicine is simply the term we use for using your mind to support the powerful healing abilities already built