The Rolling Stones turn 50 this month. The British band—and rock and roll itself—owe much of their sound to artists on Chicago’s Chess Records. WBEZ music aficionados Tony Sarabia and Richard Steele reflect on the legacy of the blues and soul label and the influence of Chess musicians like Muddy Waters, Howlin’ Wolf and Bo Diddley. And, Marshall Chess, the son of co-founder Leonard, calls in to talk about producing The Stones and other legendary acts.