common ownership of print and broadcast media in the same market. The combination of the Detroit News and WWJ-AM-FM-TV was given grandfathered protection from the new regulations, but by the mid-to-late 1970s, the Evening News Association was under pressure to break up its Detroit cluster voluntarily. Fearing that an FCC-forced divestiture was imminent, the Evening News Association agreed to trade WWJ-TV to the Washington Post Company in return for that company's flagship station, WTOP-TV (later WDVM-TV and now WUSA). On July 22, 1978, due to an FCC regulation in place at the time that forbade TV and radio stations in the same market but with different ownership groups from sharing the same call signs, channel 4 changed its call letters to the present WDIV-TV, for "Detroit's IV" (representing the Roman numeral for 4). Additionally, in a series of promotional announcements with news anchor Dwayne X. Riley, the new call letters were said to represent the phrase, "Where Detroit Is Vital". The WWJ-TV call sign was later adopted for use by the former WGPR-TV (channel 62) after its 1995 purchase by CBS, which had acquired WWJ radio in 1989 (CBS sold off its radio unit in 2017); the current WWJ-TV is a separate entity and not related to WDIV. Ultimately, the FCC never imposed any limitations on ownership of television stations and newspapers in the same market and the exchange of stations between the Evening News Association (eventually subsumed by the Gannett Company in 1985) and The Washington Post Company (which was renamed Graham Holdings Company following the sale of The Washington Post in 2013) became somewhat unusual in television broadcasting. In 1982, WDIV moved out of its facility (which had been built in 1936 for WWJ radio and expanded in 1948 and today is known as the Walker-Roehrig Building) adjacent to the headquarters of the Detroit News and moved one block to its current broadcast facility at West Lafayette Boulevard. The building has also housed the headquarters of Graham Media Group since 1997; the "Local" branding now utilized by most of the group's stations began at WDIV alongside its acquiring of flagship status in 2000. The station later became available outside the Detroit market when it was selected for inclusion on many Canadian cable providers in the late 1980s and early 1990s. WDIV's signal has been uplinked on C-band satellite since at least 1988. In 2004, the station bolstered local