On Friday 13 February 1970, Black Sabbath released their first album and a new genre was born - heavy metal. Witness speaks to guitarist Tony Iommi about the band's origins in Britain's industrial West Midlands - and the day his career nearly ended when he lost the tips of two fingers in a metal-working accident.
(Photo: Black Sabbath’s logo painted on a wall in the band’s home city of Birmingham in the UK. Credit: BBC)
