The holsters at Texas A&M University-Corpus Christi are empty this week, but the symbolic call to action has highlighted campus security again, just one week after Texas A&M University-Kingsville was placed on lockdown after an armed suspect was reported to be on campus. Dozens of students from the A&M-Corpus Christi Chapter of Students for Concealed Carry on Campus have worn empty holsters this week as part of a national movement to allow the carrying of concealed handguns on college campuses. The idea is that having a handgun readily available in college classrooms could avert outbreaks of deadly violence on campus,...