At this year's Chicago Auto Show, Mazda took the wraps off the 2009 MX-5 "Miata" roadster. As luck would have it, the first Miata made its world debut in the Windy City some 20 years ago. It was an immediate hit. To celebrate the MX-5's anniversary, Mazda decided to take visitors down memory lane by displaying a few of the most noteworthy "Miata" models. Here are the highlights. View Slideshow