Jon Wiederhorn

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

Welcome back, Bruce and Adrian.

The first album after Ronnie James Dio was kicked out of Black Sabbath.

Take a look back at the landmark disc here.

This one paved the way for thrash.

On Dec. 3, 2015, iconic Stone Temple Pilots singer Scott Weiland died of a drug overdose while on tour with Scott Weiland and the Wildabouts.

KISS released 'Rock and Roll Over' on Nov. 11, 1976.

Some say it's their best album.

On Aug. 25, 1988, Metallica released '...And Justice For All,' their first album without Cliff Burton.

On Aug. 11, 2011, Warrant frontman Jani Lane was found dead in a hotel in Woodland Hills, California.