Ryan Wilcox peered through his binoculars as a gunman fired at a large piece of glass propped up at a shooting range in the foothills of Utah’s Wasatch mountains.
Wilcox, a Republican state lawmaker charged with securing Utah’s schools, was eager to see if a polyester-based film, thinner than a credit card and applied to glass windows and doors, might answer a desperate nationwide query: How can schools stop attackers from shooting their way in?
