Social Psychology assignment

Search the Internet for a high-profile violent incident that occurred at a school in the United States.

Describe the incident.

1. What factors led to this incident?
2. Could this incident have been prevented?
3. Was the security at the school sufficient?  (What level of security was in place?  What more could have been done?)
4. What level of security would you recommend be in place at schools (elementary, middle, and high school)?

500 words