Jennings started his career early, hosting a Canadian radio show at the age of nine. He began his professional career with CJOH-TV in Ottawa during its early years, anchoring the local newscasts and hosting a teen dance show, Saturday Date, on Saturdays. In 1965, ABC News tapped him to anchor its flagship evening news program. His inexperience was attacked by critics and others in television news, making for a difficult first stint in the anchor chair. Jennings became a foreign correspondent in 1968, reporting from the Middle East.