American policymakers should look to Israel for guidance. Living constantly with the threat of terrorism, Israel solved the problem of school security long ago by hardening the target and tightening security practices. Every school with 100 or more students has at least one well-trained armed guard stationed at entrances to monitor who comes and goes.
These guards operate under the auspices of the Israel Police and undergo rigorous training every four months. Roughly 40% of applicants fail the training test, ensuring that only the cream of the crop defend the schools.