“Senjutsu,” Iron Maiden (BMG)Iron Maiden is not a band for those with short attention spans.Since blasting out of England in the late '70s in what would become known as the new wave of British metal, Iron Maiden has never been one to give record companies the kind of three-minute anthems they craved.Instead, they wrote and played (and played some more) until they were good and satisfied, and the result was often an epic track of 8-10 minutes or more, completely exploring a topic or idea until no