Bill Black was a participant in an event that many consider to mark the birth of rock and roll: the recording of Elvis Presley's first single for Sun Records on July 5th, 1954. On that day, Presley — along with bassist Black, guitarist Scotty Moore — spontaneously broke into a rocking arrangement for "That's All Right," a blues song by Arthur "Big Boy" Crudup. Black slapped the bass strings, providing the rhythm to go along with the blues, and the chemistry between the three musicians helped launch Presley's career ...