Back in the early 1940s, late at night in the clubs of Harlem, a handful of jazz musicians began to experiment with a style that no one had ever heard before. The music was fast, complicated, impossible to play for many of the older musicians -- but it soon became the lingua franca of jazz music. They called it bebop, and as the years went by, it became even more popular. Today it reigns as perhaps the best-loved style of jazz ever created. Ira Gitler...