Rock veterans Def Leppard return to heavy-metal roots

Def Leppard guitarist Phil Collen doesn't hesitate to say his band has been an outcast on the rock scene in recent years.

After scoring two of the biggest-selling albums of the 1980s in "Pyromania" and "Hysteria" (which sold some 7 million and 15million copies, respectively), the band fell out of favor after the release of the "Adrenalize" album in 1992. "Adrenalize" topped out at about 3 million in sales.

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