Watch out, Nascar-the Rocket Racing League is about to start stealing some of your famed thunder. Picture high-tech, rocket-propelled airplanes racing around three-dimensional racetracks-in-the-sky with ear-shattering ferocity. Twenty-foot-long orange plumes will trail the aerobatic X-Racers as the daredevil pilots gun the rockets for critical boosts on long straits and steep vertical climbs. They´ll drop into the pits to fuel up on liquid oxygen and kerosene before reentering the fray.