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 "A Reporter's Life", which was published in 1996. The taped memoirs became an integral part of an eight-part television series "Cronkite Remembers", which was shown on the Discovery Channel. As a newsman, Cronkite devoted his attention to the early days of the space program, and the "space race" between the United States and the Soviet Union. The National Aeronautics and Space Administration honored Cronkite on February 28, 2006. Michael Coats, director of NASA's Lyndon B. Johnson Space Center in Houston, presented Cronkite with the Ambassador of Exploration Award. Cronkite was the first non-astronaut thus honored. NASA presented Cronkite with a