Arnold Zenker 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 time, was chosen because a strike by the American Federation of Television and Radio
Walter Cronkite "The Tonight Show" hosted by Johnny Carson. The following night, Carson did a comic spoof of his on-air farewell address. As he had promised on his last show as anchor in 1981, Cronkite continued to broadcast occasionally as a special correspondent for CBS, CNN, and NPR into the 21st century; one such occasion was Cronkite anchoring the second space flight by John Glenn in 1998 as he had Glenn's first in 1962. In 1983, he reported on the British General Election for the ITV current affairs series "World In Action", interviewing, among many others, the victorious Prime Minister, Margaret Thatcher.