Pain has led to a lot of gain for Metallica over the decades. And the adage is exponential for "The Unforgiven," a dark and deeply personal song that's spun off two sequels for a trilogy as intense as ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. “[The teacher would say] ‘OK, get out your health books,’ and I would have to leave,” Hetfield ...