School security: Is there such thing as too much?

Students from across the Twin Cities marched down Marshall Avenue from St. Paul Central High School to the Minnesota State Capitol in St. Paul to demonstrate against gun violence Wednesday, March 7, 2018. Jean Pieri / St. Paul Pioneer Press Should they all have armed guards? Locked entrances with bulletproof glass? Teachers with weapons and tactical training to intercept a violent intruder? After 17 students and staff were killed on Valentine's Day at a high school in Parkland, Fla., lawmakers a