The memories that flash first are happy. Nebraska coach Fred Hoiberg remembers Chicago for the day his twin sons were born, for the two seasons he spent establishing himself as an NBA rotation player on the Bulls, and for the playoff series he almost won as Chicago’s coach in 2017. But as the Huskers travel to Northwestern, located 14 miles north of Hoiberg’s old life, on Tuesday, the more painful recollections return. The mounting losses, the speculation surrounding his job, and the stress he shouldered in Chicago are resurfacing in Lincoln four years later.