Most of the music history books say it's May 25. Miles Davis was actually born on May 26, 1926, in Alton, Illinois. He introduced a new trumpet sound and a new way of playing jazz. It was dubbed "cool" and he was dubbed "the Prince of Darkness" for the aloof attitude and tough guy persona he cultivated. From New York, Tom Vitale reports on the elements of cool and the personality that fueled it. We hear portions of interviews he's done over the years with the late Gil Evans and Gerry Mulligan as well as Herbie Hanccock and Nat Hentoff. (7:45) Davis' recordings are being repackaged and reissued by Columbia Legacy Records.