star Henry Winkler (in character as Arthur "Fonzie" Fonzarelli) to herald its return to ABC with the slogan "Happy Days are Here Again" in on-air and print campaigns leading up to the switch. To this day, WISN-TV has been one of ABC's most successful affiliates, and bills itself as such in its own promotions. Around the same time, the station was the first which utilized newscast composer Frank Gari's "Hello News" package, which included an imaging song individualized to each market's city; in this case "Hello Milwaukee", which remains well-remembered and remains used in various ways by WISN-TV to the present day, and was cited as one of the factors in driving viewers to the station in the late 1970s and allowing it to be competitive. For most of its years with ABC, the station did not include the network's logo next to theirs, branding solely with the channel number and/or call letters vocally and visually (outside of network-created radio promos which referred to the station as "12 ABC") until 2012, when the network began to contractually require the ABC logo be included with any affiliate's logo redesign. In November 2014, the station unveiled their current logo with the call letters beneath the long-used "12" logo form and the ABC logo on the right side of the "12" number mark, the first with the ABC logo blended in for all uses, including for news and entertainment programming, and ending a long run where the station's call letters were rendered in Bank Gothic font. Vocally, the station remains "WISN 12". The station is among the few in the nation which has their logo in a transparent bug at all times, including ABC network and news programming, though not during commercial breaks or paid programming. Channel 12 was the first commercial station in the market to produce a high-definition broadcast, airing the Summerfest "Big Bang" fireworks show in HD on June 29, 2006. Milwaukee Public Television assisted WISN-TV in the production of the broadcast, and have continued to do so each year since, with additional help from sister stations in Sacramento and Boston in later years. Hearst sold WISN radio and what by then became WLTQ to Clear Channel Communications in 1997, and the third floor WLTQ/WISN radio studios were vacated in 2000 after their move to the expanded WOKY facility in Greenfield. All ties between WISN-TV and its former sister radio