Around midmorning on Thursday, parents across Montana started receiving texts from their children that schools were in lockdown. Schools quickly confiscated students’ phones, and parents panicked as they couldn’t find out anything more about what was happening. Schools statewide received threats of a suicidal person with a gun. Billings, Bozeman, Butte, Great Falls, and Kalispell all received threats. Fortunately, there was no such gunman. The threatening phone calls originated from a foreign country, with schools receiving the same message. But the incident raises the question of what Montanans can do to keep schools safe . . . Instead of using...