By 1926, it seemed that John R. Brinkley's experimental rejuvenation cure--transplanting goat glands into aging men--had taken the nation by storm. Never mind that "Doc" Brinkley's medical credentials were shaky at best and that he prescribed medication over the airwaves via his high-power radio stations. To most in the medical field, he was a quack. But to his many patients and listeners, he was a brilliant surgeon, a savior of their lost manhood...