By Lulu Garcia-Navarro, Sophia Alvarez-Boyd, and James Doubek, National Public Radio, November 10, 2019
A regular drumbeat of mass shootings in the U.S., both inside schools and out, has ramped up pressure on education and law enforcement officials to do all they can to prevent the next attack.
Close to all public schools in the U.S. conducted some kind of lockdown drill in 2015-2016, according to the National Center for Education Statistics.
Last year, 57% of teens told researchers they worry about a shooting happening at their school. A slightly higher percentage of parents of teenagers, 63%, fear a shooting at their child's school, the Pew Research Center found.