Plot: An advanced pop musician by anyone's standards, David Crosby has become a poster boy for a crash and burn hippie culture. From his early days with the Byrds, he had a wild twinkle in his eye, and while recording political and romantic hymns like "Wooden Ships" and "Guinevere" during the '60s and '70s, the superb vocalist was sewing the seeds of the profoundly drugged-out lifestyle to come