Desc: The Diet America Challenge: Directed by Louis J. Horvitz. With Cheryl Tiegs, Bob Arnot, Lance Britt, George Burns. A special that explores America's concerns with staying fit and dieting. Segments include interviews with well-known personalities who discuss their dieting and exercise regimes as well as the six-week dieting efforts of one family in Nashville. Computer enhancement is used to show how celebrities might look at various weights and medical views on dieting are also examined.