At the height of his career, Louis Armstrong and his band toured Europe. The sextet had come to perform America's greatest export -- jazz -- but Armstrong's adoring audiences knew him as much more than a musician. He was known as the ambassador of goodwill. Armstrong's joyous stage presence electrified audiences, but many of them didn't know he was the father of jazz itself. He pushed music into the 20th Century by inventing a new way of playing. By doing so, he helped to change the world of music, and the culture we live in, forever.