FAIRFIELD, Ohio -- To most people, a plastic cup is just a vessel from which to drink, but for Robert Weatherington, plastic cups mean competition. The 17-year-old from Fairfield is part of the U.S.

Click here for the original audio. Thousands of U.S. schools have their students race the clock to stack cups in gym class. Why? A former circus clown from Colorado named Bob Fox holds the key. Here & ...