Jon Wiederhorn

Their breakthrough album.

On Sept. 20, 1980, Ozzy Osbourne delivered his first solo album, 'Blizzard of Ozz.'

A monster album.

One of metal's most important albums.

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

Get the story to the follow-up to the panned 'St. Anger.'

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

And with that, System of a Down exploded.

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.