Arnold Zenker Arnold Zenker Associates in Boston, which trains "people to successfully master the public spotlight." 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
CBS Evening News officials complained to CBS founder William S. Paley. The second half of the report was aired the following Monday, but only for eight minutes. Cronkite was replaced as anchor of the program the Monday after his retirement, March 9, 1981, by then 49-year-old Dan Rather, who had been with CBS News as a correspondent since the early 1960s and later became a correspondent for the network's newsmagazine "60 Minutes". Concerns about excessive liberalism in the media were frequently leveled at Rather, the "CBS Evening News", CBS News and CBS in general. Some of these concerns dated from Rather's position as