among the FCC's "top-four" ratings threshold for duopolies and the U.S. Department of Justice's Antitrust Division wanting to seek further review of the transaction). Less than one month after the FCC voted to have the deal reviewed by an administrative law judge amid "serious concerns" about Sinclair's forthrightness in its applications to sell certain conflict properties, on August 9, 2018, Tribune announced it would terminate the Sinclair deal, intending to seek other M&A opportunities. Tribune also filed a breach of contract lawsuit in the Delaware Chancery Court, alleging that Sinclair engaged in protracted negotiations with the FCC and the DOJ over regulatory issues, refused to sell stations in markets where it already had properties, and proposed divestitures to parties with ties to Sinclair executive chair David D. Smith that were rejected or highly subject to rejection to maintain control over stations it was required to sell. Had the deal been approved, it would have marked a re-entry into Kansas City for Sinclair, which previously owned KSMO-TV from 1994 to 2005, when it sold that station to Meredith to form a duopoly with KCTV. On December 3, 2018, Irving, Texas-based Nexstar Media Group—which had previously owned ABC affiliate KQTV in St. Joseph from April 1997 until January 2017—announced it would acquire the assets of Tribune Media for $6.4 billion in cash and debt. The deal—which made Nexstar the largest television station operator by total number of stations upon the sale's closure on September 19, 2019—would put WDAF-TV under common ownership with Nexstar's existing virtual clusters in the adjacent markets of Topeka (among NBC affiliate KSNT, Fox affiliate KTMJ-CD and ABC-affiliated SSA partner KTKA-TV) and Joplin (between NBC affiliate KSNF and ABC-affiliated SSA partner KODE-TV). Channel 4 would also retain WHO-DT in Des Moines as a sibling, with Nexstar's current duopoly in that market of WOI-DT and KCWI being sold to Tegna Inc. Subchannel history WDAF-DT2 On February 13, 2011, through an agreement between network owner Tribune Broadcasting and then-WDAF-owner Local TV that resulted from the companies' existing management agreement, the station launched a digital subchannel on virtual channel 4.2, which served as a charter affiliate of the Antenna TV classic television network (which had its official nationwide launch just over one month earlier on January 1, with WDAF being one of only four Local TV-owned stations that did not begin carrying Antenna TV on the date of its launch). WDAF-DT3 On