The value of defense in football was demonstrated By two television events in the early 1960s. On 30 October 1960 one in four televisions in America was tuned in to the "Violent World of Sam Huff," an episode of The Twentieth Century, a CBS news series hosted by Walter Cronkite. Huff was the best of the vicious pro-football middle linebackers, and Cronkite's hour-long documentary showed just how rough that job was. Huff wore a microphone in his helmet during practice and a game as the television cameras recorded his actions with narration by Cronkite. "Anytime that you play football on the field there is no place for nice guys. I mean you have to be tough," Huff explained. "When we're out on the field, we have to shake them up. It's either . . . an expression . . . kill or be killed." Huff made as dramatic...