Hot on the heels of punk, mixing aggressivity and urgency with the bluesier sensitivity of hard rock and a darker imagery, came the New Wave of British Heavy Metal in the late seventies. Iron Maiden was the leader of the movement and showed the way for thousands of copycats, especially for their 1982 breakthrough album The Number Of The Beast on. But the original keeps going strong, and the stadiums still fill up to hear the triple guitar assaults of Dave Murray, Jannick Guers and Adrian Smith.