as the Tribune Broadcasting Company in January 1981, but retained the WGN Continental moniker as its de facto business name until 1984 and as the licensee for WGN-TV and WGN Radio thereafter. The company gained its third television and second radio station in 1960, when it purchased KDAL-TV (now KDLH) and KDAL (AM) in Duluth, Minnesota from the estate of the late Dalton LeMasurier (Tribune sold KDAL-TV in 1978 and KDAL radio in 1981); the company would later purchase KCTO (subsequently re-called KWGN-TV) in Denver from J. Elroy McCaw in 1966. Tribune's later television purchases included those of WANX-TV (later renamed WGNX) in Atlanta and WGNO in New Orleans (both in 1983); KTLA in Los Angeles ( in 1985), WPHL-TV in Philadelphia (in 1992). WLVI-TV in Boston (owned from 1994 to 2006); KHTV (now KIAH) in Houston (in 1995); KTTY (now KSWB-TV) in San Diego (in 1996); KCPQ and KTWB-TV (now KZJO) in Seattle (in 1998 and 1999, respectively); and WBDC-TV (now WDCW) in Washington, D.C. (in 1999). WGN-TV and WPIX were the only stations that Tribune had owned since their inceptions. Tribune also operated several local cable television systems from 1977 to 1985. In 1993, Tribune launched Chicagoland Television (CLTV), a regional cable news channel for the Chicago area, which originally operated separately from the company's other Chicago media properties until it merged its operations with WGN-TV's news department in 2009. In November 1994, Tribune Broadcasting formed a partnership with several minority partners, including Quincy Jones, to form Qwest Broadcasting; Qwest operated as a technically separate company from Tribune (which owned stations in a few markets where Tribune-owned stations, including WATL in Atlanta, which was operated alongside Tribune-owned WGNX); Tribune would later acquire the Qwest stations outright in November 1999. In January 1995, Tribune Broadcasting became a partner in The WB Television Network, in a joint venture with the Warner Bros. Television division of Time Warner. Tribune initially had a 12.5% ownership interest in the network at its launch and later increased its stake to 22%. In addition, partly as a result of a November 1993 affiliation deal with the network, most of Tribune's television properties were WB affiliates. On July 2, 1996, Tribune acquired Renaissance Broadcasting, which owned Fox- and WB-affiliated stations in several large and mid-sized markets. On January 24, 2006, Time Warner announced that it would partner with CBS Corporation to form a new network that