In October 2023, when Nexstar Media Group finalized its acquisition of McKinnon Broadcasting Co. and San Diego’s KUSI-TV, Steve Cohen’s 20-year run as KUSI’s news director was over. At the time, Cohen was in his 50th year of working in television news. During his half-century in TV newsroom executive positions, Cohen managed TV newsrooms in some of America’s largest markets, including New York, Detroit, Philadelphia and Los Angeles, as well as s…