Roone Arledge was the former president of ABC News and Sports, COKIE Roberts was a political commentator for ABC News, DIANE Sawyer was an anchor for ABC World News, and Ted Koppel was the host of Nightline on ABC. Arledge was responsible for revolutionizing sports broadcasting and news programming at ABC, and he was also the first to introduce the concept of 'instant replay' in sports broadcasting. He was also responsible for hiring Roberts, Sawyer, and Koppel, who all went on to become well-known figures in the media.