Students at Lanier Career Academy learned Thursday that the heroes of Sept. 11, 2001, included both courageous men and women and their K-9 helpers. Some of the students were immigrants who are new the country and had little prior knowledge of 9/11, said Lynn Murphy, the teacher who organized the event in which a group of 60 students got to see local search and rescue dogs at work. The search-and-rescue team from the Dawson County Fire Department visited students at the school Thursday to demonstrate the skills and importance of the dogs.