Just look at the inspirations for the all-American hamburger and hot dog in the German cities of Hamburg and Frankfurt.

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Nothing is more American than a hot dog extra points if you order it at the ballpark or eat it outside fresh off a charcoal grill.

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"It used to be at an airport you could get anything you wanted--as long as it's a hot dog or a piece of cold pizza, " jokes Greg Principato, president of the North American Region of the Airports Council International.

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