Black Sabbath

Three decades of excellence!

Iommi called Chapman a rock during a difficult time in his career.

Drummer looks back on his career with "attitude of gratitude."

Singer Tony Martin recollected the tumultuous events.

Tony Martin says he was asked to return after being fired when Tony Iommi told him album wasn't "working out."

The rocker's known to keep a prolific stockpile.

Tony Iommi quickly threw it together, after being told the band didn’t have enough songs for their second album.

"It’s horrible, really," former Black Sabbath guitarist quips.

He's hinted at it for several years.

Drummer recalls shared same vision of "specter" that was their "guardian angel."