WDIV-TV (channel 4) is a television station in Detroit, Michigan, United States, affiliated with NBC. It serves as the flagship broadcast property of the Graham Media Group subsidiary of Graham Holdings Company. WDIV-TV maintains studio facilities on West Lafayette Boulevard in Detroit, making it the only major television station in the market with offices and studios within the Detroit city limits. Detroit's other television stations are all based in the suburb of Southfield; WDIV's transmitter is, however, located on Greenfield Road in Southfield. History Early history The station first signed on the air as WWDT on October 23, 1946, for one day of demonstrative programming; regular programming commenced on March 4, 1947. It was the first television station in Michigan and the tenth station to sign on in the United States overall. The station was originally owned by the Evening News Association, parent company of The Detroit News, along with WWJ radio (AM 950 and FM 97.1, now WXYT-FM). On May 15, 1947, the television station changed its call letters to WWJ-TV to match its radio sisters. Channel 4 has always been an NBC affiliate owing to WWJ radio's longtime affiliation with the NBC Red Network, but also aired some programs from the DuMont Television Network prior to WJBK-TV (channel 2)'s sign-on in October 1948. Channel 4 had a number of broadcasting firsts in Michigan including the first telecast of Detroit Tigers, Red Wings and Lions games as well as the state's first televised newscasts. The station's studios were originally located at 600 West Lafayette, across the street from the Detroit News building in downtown Detroit (and next door to its present studio location). In 1954, the station moved its transmitter from the Penobscot Building in Downtown Detroit to the intersection of Greenfield and Lincoln roads in Southfield. Network programming was broadcast in color starting in 1954. The station began broadcasting its newscasts and other locally produced programs in color in 1960, when it purchased new studio camera equipment. Over the years, the Evening News Association acquired several other broadcasting outlets, such as KTVY (now KFOR-TV) in Oklahoma City, KOLD-TV in Tucson, Arizona, and WALA-TV in Mobile, Alabama. Eventually, the Evening News Association created Universal Communications Corporation as a holding company for its broadcasting interests, with WWJ-AM-FM-TV as the flagship stations. Trade to The Washington Post Company In 1969, the Federal Communications Commission (FCC) began to impose restrictions on the