You see, these are fans who are used to explaining -- and being summarily dismissed for -- their love of the band, said " RUSH: Beyond the lighted stage" documentarians Sam Dunn and Scot McFadyen.

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"Iron Maiden has never relied on radio play or TV or the conventional forms of media that a lot of music bands rely on, " says Sam Dunn, a documentary filmmaker and Maiden fan who's making a film of the group's "Somewhere Back in Time" tour.

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Dunn's lawyer says it's unfair for Uncle Sam to go after Dunn, since he is already dealing with a Canadian regulatory action.

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The MGs were the house band for Stax Records, and Dunn can be heard on songs such as Otis Redding's Respect and Sam and Dave's Hold On, I'm Comin'.

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