Jon Wiederhorn

On Sept. 17, 1991, Ozzy Osbourne reached a career turning point with his solo disc 'No More Tears.'

On Sept. 11, 2001, Slayer issued their brutal barrage, 'God Hates Us All.'

Just when it looked like Judas Priest had been dethroned, the defenders of metal lashed back with their 12th album, 'Painkiller.'

A true metal classic.

On Aug. 21, 1990, Anthrax released their 'Persistence of Time' album with a lot of drama surrounding them.

On July 21, 1971, Black Sabbath released their 'Master of Reality' album.

On July 5, 1988, Slayer released their follow-up to 'Reign in Blood.'

On June 30, 1998, System of a Down made their presence felt with their self-titled debut disc.

Black Sabbath, with Ronnie James Dio back in the band, released their 'Dehumanizer' album on June 22, 1992.

The last of five albums Black Sabbath recorded with vocalist Tony Martin.

Dave Mustaine would go on to form Megadeth and release one of the best thrash debut albums ever.

Not at all the Pantera that came to be in the '90s.