AC/DC's latest album, Power Up, was released Friday. It's a tribute to the band's late co-founder, Malcolm Young. But it's also a big comeback.
On its last tour, only a few years ago, things weren't looking good for the group. Malcolm was too ill to perform. Singer Brian Johnson was losing his hearing and had to leave the tour midway through. And bassist Cliff Williams retired afterward. Some thought AC/DC was over — but not Malcolm's brother, guitarist Angus Young.