Supermodel, author, businesswoman, and talk show host . . . what's next?Tyra Banks started knocking down barriers early in her career.She was the first black model to appear on the cover of the Sports Illustrated Swimsuit Issue and the first woman ever to appear on the cover of GQ.As a model, Tyra challenged weight discrimination by marketing her curves instead of hiding them.She works hard to promote positive self-images for young women of all races...