Secret Service Issues Guide to Help Prevent School Shootings

WASHINGTON — Mock-shooting drills. Metal detectors. Bulletproof classroom shelters.

As deadly school shootings continue to be a fixture in headlines and an everyday fear for districts and students, schools across the country have resorted to “hardening” their campuses.

https://www.nytimes.com/2018/07/12/us/politics/secret-service-report-school-shootings.html