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
Walter Cronkite At about 3:30 pm EST, Cronkite came back into the newsroom to relay some new information. The two major pieces of information involved the Oath of Office being administered to Vice President Johnson, which officially made him the thirty-sixth President, and that Dallas police had arrested a man named Lee Harvey Oswald whom they suspected had fired the fatal shots. After that, Cronkite left again to begin preparing for that night's "CBS Evening News", which he returned to anchor as normal. For the next four days, along with his colleagues, Cronkite continued to report segments of uninterrupted coverage of the