Arnold Zenker Arnold Zenker Arnold L. Zenker (born 1938) is a retired media broadcaster and public appearance counselor who gained brief stardom by sitting in for Walter Cronkite on the "CBS Evening News" in 1967. Zenker studied at the University of Pennsylvania in Philadelphia, from which he received an undergraduate and a law degree. In 1967 at the age of 28, he was asked to sit in for anchor Walter Cronkite to deliver the nightly news. Zenker, working as a Manager of News Programming at CBS at the time, was chosen because a strike by the American Federation of Television and Radio
Walter Cronkite the "predominant news voice in America." Affectionately known as "Uncle Walter," he covered many of the important news events of the era so effectively that his image and voice are closely associated with the Cuban Missile Crisis, the assassination of President John F. Kennedy, the Vietnam War, the Apollo 11 Moon landing, and the Watergate scandal. "USA Today" wrote that "few TV figures have ever had as much power as Cronkite did at his height." Enjoying the cult of personality surrounding Cronkite in those years, CBS allowed some good-natured fun-poking at its star anchorman in some episodes of the network's