Officials said procedures worked as intended, but a gunman was still able to enter the facility, kill students and teachers, and hold off police for 30 minutes.
https://www.washingtonpost.com/national/santa-fe-school-had-a-shooting-plan-armed-officers-and-practice-and-still-10-people-died/2018/05/19/58b1b55e-5b8d-11e8-8b92-45fdd7aaef3c_story.html
* ‘‘I was not one bit surprised that it happened.’ Shock over school shootings has turned to numbness.