The classic Black Sabbath lineup of Tony Iommi on guitar, Geezer Butler on bass, Bill Ward on drums and Ozzy Osbourne on vocals produced a classic album - but not without significant input from Iommi.
If there's just one moment in rock history that will be remembered forever, it's got to be Jimi Hendrix's earth-shattering appearance at the Woodstock festival on 18th August 1969...
