STEAD AIRPORT (Sept. 14) – For the 51st year the sky north of Reno was filled with the sound of planes racing each other. The Reno National Championship Air Races is, with one exception, the only place on the planet where pilots race each other around a course.   And Sunday is when all the class champions are crowned after their individual Gold races. This year’s event appeared to have the potential of being an epic race but in the end a young lion won the Breitling Gold Unlimited event and notched his sixth championship. It wasn’t exactly easy