More financial numbers are in today. Volkswagen, Nissan and Hyundai all posted their second quarter profits. Hyundai dropped its industry-wide global sales forecast for the year because of economic concerns in Europe and China. Mazda is teasing the upcoming 2014 Mazda6 before it debuts next month at the Moscow International Automobile Salon. All that and more, plus a look at how Cadillac is rewriting the book on underbody aerodynamics.