In the past month, bearded drifter walked into a Colorado school and fatally shots a student before taking his own life, three Wisconsin boys were charged with plotting a bomb attack on their high school and, a gunman bursts into a Vermont elementary school looking for his ex-girlfriend and shot a teacher, the Associated Press reports. Since the 1999 Columbine massacre that left 15 people dead, there has been a concerted effort to improve school safety. Experts say there is no way to guarantee that a stranger or student won’t be able to injure or kill on school grounds. “There’s no perfect security, from the White House to the schoolhouse,” said Kenneth Trump of Cleveland-based National School Safety and Security Services.
“When you factor in unpredictable outsiders, when you have a roaming monster walking into the schools, we have to be realistic,” Trump said. “There are some incidents you’re not going to be able to prevent.” Trump counts 17 nonfatal school shootings so far this school year. There were 85 the previous school year and 52 in the 2004-2005 school year. Since Columbine, the number of fatal school shootings in a school year has ranged from three (2002-03) to 24 (2004-05).