From 1953 to 1957, Cronkite hosted the CBS program "You Are There", which reenacted historical events, using the format of a news report. His famous last line for these programs was: "What sort of day was it? A day like all days, filled with those events that alter and illuminate our times ... and you were there." In 1971, the show was revived and redesigned to attract an audience of teenagers and young adults, hosted again by Cronkite on Saturday mornings. In 1957, he began hosting "The Twentieth Century" (eventually renamed "The 20th Century"), a documentary series about important historical events of the century composed almost exclusively of newsreel footage and interviews. A long-running hit, the show was again renamed as "The 21st Century" in 1967 with Cronkite hosting speculative reporting on the future for another three years. Cronkite also hosted "It's News to Me", a game show based on news events.