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 announcing his impending resignation, the night before. The January 22, 1973 broadcast of the "CBS Evening News" saw Cronkite break the news of the death of another notable American political figure: former president Lyndon B. Johnson. At approximately 6:38 pm Eastern Time, while a pre-recorded report that the Vietnam peace talks in Paris had been successful was being played for the audience, Cronkite received a telephone call in the studio while off camera. The call was from Tom Johnson, the former press secretary for President Johnson who was at the time serving the former chief executive as station manager at