Sam Lay is a traveling blues museum. He helped blues go electric in the late 1950s and early 1960s, playing drums for Little Walter, Howlin' Wolf, Muddy Waters, James Cotton, Lightnin' Hopkins and Hound Dog Taylor -- the creators of what's now called Chicago blues. "I've been out there so long, I've worked with almost everybody you can name," he says. "In the Delta... More >>>