Jon Wiederhorn

On Dec. 28, 2015, we lost an all-time legend.

Metallica stepping way outside their comfort zone.

The last GN'R album with Slash and Duff.

Their first album with Janick Gers.

On Aug. 7, 1986, a judge ruled on a lawsuit against Ozzy Osbourne and his record labels tying the song 'Suicide Solution' to the death of a teen.

On May 24, 1986, AC/DC released 'Who Made Who,' the soundtrack for the Stephen King film 'Maximum Overdrive.'

One of the biggest albums ever.

Out of retirement and into the studio.

Here's how it happened.

March 15, 1976.