SHOOTER DRILLS = STATE TERROR

Nine out of 10 public schools across the U.S. conduct mass shooting drills. Twenty states have laws that enact lockdown drills in all of its public schools, and 30 states have "broad emergency plans" that may include lockdowns.

But living in the environment of crisis preparedness can also add to the anxiety, Brymer said. While the debate on active-shooter drills dates back 20 years, since the Columbine High School attack, reports make evident the psychological trauma on those who go through them, prompting some to question tactics and what can be improved.

http://www.newsweek.com/teacher-lockdown-description-goes-viral-835289