Blues history is steeped in Chicago's sidewalks; it floats out of its restaurants, airport lounges and department stores. It is a fundamental part of the city's heritage that every resident should know and every visitor should be afraid to miss. Allow Rosalind Cummings-Yeates to take you inside the Checkerboard and Gerri's Palm Tavern, where folks like Muddy Waters, Howlin' Wolf, Willie Dixon and Ma Rainey transformed Chicago into the blues mecca....