 Complete the following phrase:  In 1967, after winning the 24 Hours of Le Mans together with A. J. Foyt, Gurney spontaneously sprayed champagne while celebrating on the podium, which thereafter became a custom at many motorsports events. As owner of All American Racers, he was the first to put a simple right-angle extension on the upper trailing edge of the rear wing. This device, called a Gurney flap, increases downforce and, if well designed, imposes only a relatively small increase in aerodynamic drag. At the 