...This likely comes as a surprise to each of you," Publisher Keith Moyer acknowledged during a late-afternoon staff meeting. "These are indeed challenging times for newspapers, especially larger ones, such as ours," Moyer said. Speaking to the Star Tribune staff Tuesday, an Avista executive said the firm was drawn to the Star Tribune by its dominant market share in the Twin Cities. The Star Tribune, which has been in operation under different names and owners for nearly 140 years, had 40 percent of the Twin Cities advertising market in the third quarter. "I'm here today because my partners at Avista...