Police officers wearing heavy body armor and tactical gear carefully forced their way into each room at a Western Connecticut State University residence hall as they searched for two armed men on Thursday. The drill involved about two dozen people, including police officers from WCSU, Newtown, Danbury and its SWAT team, members of the university’s Student Safety Services — a group of students who assist police similar to a neighborhood watch — among others. Law enforcement student Jessica Ostroski, a supervisor for the Student Safety Services, said the exercises put important skills to the test and also made the university community more confident that police are ready for a worst-case scenario. School shootings have become a growing concern across the country, with nearby Newtown being the stage of one of the worst such tragedies in U.S.