station duopoly in the Louisville market. WDRB continued to carry cartoons through Fox Kids throughout the 1990s; the Fox Kids weekday afternoon lineup was discontinued at the end of 2001, when the remaining Saturday block moved to channel 58 until its successor 4KidsTV was discontinued by Fox in November 2008. 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. This was followed by a second—even more elaborate—"Thunder" telecast in HD in April 2008. The station began phasing out the "Fox 41" branding in favor of simply branding by the WDRB call letters in May 2011. While this occurred shortly after sister station KTRV-TV in Boise, Idaho unexpectedly lost its Fox affiliation, station management stated that the rebrand was done in order to bring its branding in line with Louisville's other major network stations–NBC affiliate WAVE (channel 3), ABC affiliate WHAS-TV (channel 11) and CBS affiliate WLKY (channel 32)–who have all long branded with their call letters. Additionally, station management wanted to distinguish the station from Fox News Channel; WDRB is one of a handful of Fox affiliates that omit network references in their branding. In early 2011, the master control operations for WDRB and WMYO were upgraded to allow the transmission of syndicated and locally produced programs in high definition; it also upgraded its severe weather ticker seen on both stations to be overlaid on HD programming without having to downconvert the content to standard definition. On June 1, 2012, WDRB, WMYO and their respective subchannels were pulled from Insight Communications, what was then the market's major cable provider, as Block was unable to come to terms on a new retransmission consent agreement with Time Warner Cable (which purchased Insight in February 2012, but had not yet rebranded those systems under the latter until in 2013). The affected stations were restored on June 6, 2012, as a result of a new carriage agreement between Block and TWC. In May 2013, WDRB began construction of an additional of space at its Muhammad Ali Boulevard studio facility, including an expanded newsroom and sales area; the addition of two conference rooms; offices for finance and editing departments; and the addition of a secondary studio to be