The story of Muscle Shoals, Ala., and how it midwifed classic songs and albums from such artists and acts as Aretha Franklin, the Rolling Stones, Wilson Pickett and Lynyrd Skynyrd; and became, in the words of Keith Richards, "rock and roll heaven." Others sharing their insights and memories: Gregg Allman, Bono, Clarence Carter, Mick Jagger, Alicia Keys, Percy Sledge and record producer Rick Hall, who founded FAME Studios there in 1961.