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 President, mentioning that it came from a reliable source. Before the network left KRLD's feed for good, Barker first announced, then retracted, a confirmation of Kennedy's death. CBS cut back to Cronkite reporting that one of the priests had administered last rites to the president. In the next few minutes, several more bulletins reporting that Kennedy had died were given to Cronkite, including one from CBS's own correspondent Dan Rather that had been reported as confirmation of Kennedy's demise by CBS Radio. As these bulletins came into the newsroom, it was becoming clearer that Kennedy had in fact lost his