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 News Radio in addition to local news, weather, video news and other information to radio and television stations, as well as traffic reporting services. The network is the oldest unit of the CBS Corporation and traces its roots to CBS's predecessor, United Independent Broadcasters, founded in 1927 with 47 affiliates. The next year, Columbia Records invested in the radio network, which was named the Columbia Phonographic Broadcasting System. Eventually, the record company pulled its backing from the struggling web. William S. Paley bought a half-interest in what became the Columbia Broadcasting System in 1928, and became its president. (In 1938, CBS bought