<P> On late weeknights, ABC aired Nightline at 11: 30 PM for many years . The program is now seen at 12: 35 . From 2 to 6 AM, CBS offers its Up to the Minute, a program consisting of repeats of features from other CBS News programs, interspersed with new news, weather, and sports updates . Few affiliates air the entire broadcast, but most air a substantial portion of it . ABC airs its eclectic World News Now from 2AM to 3: 30AM, and many affiliates repeat a portion of it to fill time until America This Morning . NBC airs a repeat of the fourth hour of Today and talk show encores in these time periods . </P> <P> Unlike ABC, CBS and NBC, Fox does not national news programs or newsmagazines on weekdays . On Sundays it airs Fox News Sunday, produced by its sister Fox News Channel . Fox does provide coverage of breaking news of major events such as presidential debates, primarily hosted by Fox News Channel anchor Shepard Smith . </P> <P> The advent of cable television in the United States led to the eventual birth of cable news . On June 1, 1980, Ted Turner launched CNN, the first 24 - hour cable news operation . The station gained reputation significantly with its 1991 coverage of the Gulf War . </P> <P> The success of CNN inspired many other 24 - hour cable news stations . Today, CNN, as well as Fox News, MSNBC, HLN, Fox Business Network, Bloomberg Television, and CNBC compete for viewers in the national cable news arena . Regional cable news operations, such as New England Cable News, NY1, Northwest Cable News, Pittsburgh Cable News Channel and Texas Cable News, have also gained prominence among regional viewers . </P>

Who founded cable news network (cnn) in 1980 leading to around-the-clock cable news