Pennsylvania families note promised investment has yet to deliver safer mills or cleaner air in the Mon ValleyIt was two days before Father’s Day, and Trisha Quinn was wondering how her six, 12 and 17-year-old nieces and nephews would handle the first of many without their dad.Timothy Quinn, 39, w orked at the Clairton Coke Works plant south of Pittsburgh, one of US Steel’s biggest production sites and the largest of its kind in the western hemisphere, for 18 years. Last August, he and colleague, Steven Menefee, were killed there in an explosion. Continue reading... ...read more read less