Two years ago, in the depths of the global economic crisis, many carmakers skipped the North American International Auto Show in Detroit, Michigan. Last year, the car show bounced back, attracting about 715,000 visitors.For 2011, carmakers expect even more people to be attracted by numerous world premieres. Germany's top automakers are also all present. Among them is Porsche, after several years absence, with a very special technical highlight.
