Jonesboro, Columbine, Virginia Tech. Those names and others have become tragic shorthand for school shootings. Today, when there’s a threat, the typical lockdown plan that most schools follow is sound the alarm, call police, lock doors, and stay put. But a growing number of schools are adopting controversial training that includes how to fight back against a gunman. WBHM's Southern Education Desk reporter Dan Carsen has the story.