WDRB-TV first signed on the air on February 28, 1971, becoming the first independent station in the Louisville market. On April 5, 1987, when the network expanded its programming nationally to primetime, it became an affiliate of the Fox network. On April 21, 2007, WDRB became the first television station in Louisville to televise the Kentucky Derby Festival’s all-day “Thunder Over Louisville” air and fireworks show in high definition—which at the time, was one of the largest technical undertakings ever attempted by an American television station. In June 2013, WDRB gained notice in the television industry when it debuted a promo criticizing the broad, constant, and generalized use of the term “breaking news” by other news stations. To coincide with the promo, WDRB posted on its website a “contract” outline of its journalism practices with its viewers and advertisers, with the former list promising to judiciously use “breaking news” as well as a general promise to deliver news in a truthful, balanced and informative manner, and without overt hype and sensationalism.