Just watching the DVD and wanted to get an Al Green CD with him singing Sam Cooke's classic, "A Change is Gonna Come" and the group that does Dylan's "All Along The Watchtower", identified as Watchtower Four. I went to both Amazon and did a Google search to find a CD by this group, but found nothing. Sounded like it was Hendrix himself on the soundtrack of Ali. Anyone have the inside scoop. Is there really a group Watchtower Four?