Every year, the Cole Bros. Circus makes its way around the country, stopping in small towns along the way. Billed as "the world's largest circus under the big top," it continues an American family tradition that began in 1793.

Clowns are the ambassadors of the circus. They greet patrons and entertain them throughout the show with their quirky antics.

Although many see the circus clown in action under the big top, few get a peek behind the scenes where the illusion is created.

Frame by Frame offers a rare look at clown alley.