Alva Review-Courier -

Robb Elementary School had measures in place to prevent this kind of violence. A fence lined the school property. Teachers were ordered to keep classroom doors closed and locked. Students faced regular lockdown and evacuation drills.

But when an 18-year-old man arrived Tuesday at the school in Uvalde, Texas, intent on killing children, none of it stopped him.

Security failures allowed the shooter to massacre 19 students and two teachers, school safety experts say. The shooting already has led to calls to fortify schools further, on top of millions spent on equipment and other measures follo...