I write for Back Page Magazine, and we just scored a great interview with Bill Ward of Black Sabbath. In the interview, he discusses the "Black Zeppelin" session that supposedly took place in the 1970s. Zeppelin apparently hung out in the studio with Sabbath, and Bonzo went crazy on the song 'Supernaut'. This has been a rumor for years, as I'm sure you know. We spoke with Bill Ward and he discussed some pretty detailed accounts of the day's events, shining some light on an otherwise w