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.

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 & Now ‘s Peter O’Dowd uncovers the ...