10 Things Your Company Can Do to Increase Your Security Right Now - overview of top security considerations created by EDS 

The Appropriate and Effective Use of Security Technologies in U.S. Schools: A Guide for Schools and Law Enforcement Agencies - created by the U.S. Department of Justice Office of Justice Programs

Guide for Preventing and Responding to School Violence - created by the International Association of Chiefs of Police.  Includes sections on Prevention, Threat Assessment, Crisis Planning and Preparation, During a Major Crisis, After a Crisis and Legal Considerations 

Sandia National Laboratories - funded by the U.S. Department of Energy to work with government and industry to preserve the nation's security