Concerns growing that lockdown drills may traumatize students

"Ninety-five percent of American public schools conduct some form of regular active shooter safety drill—sometimes called a lockdown or active threat drill—according to the National Center for Education Statistics," Anya Kamenetz reports over at Public Radio Tulsa.

But concerns are growing that these drills have not been proven effective in preventing violence and that they may even traumatize some students. Now the advocacy group Everytown For Gun Safety is joining with the American Federation of Teachers and the National Education Association—the nation's largest education unions, with several million members—in calling for schools to reassess the use of lockdown drills.