Since the late 60s, Judas Priest has been a stalwart of rock and metal. Next week, they’ll release their 20th full-length studio effort in Invincible Shield, with most of the members now in their 70s.

Judas Priest is one of heavy metal’s most important bands — the ultimate defenders of the style for four decades running, through periods of both acclaim and scorn, and hard-ly any ...