Article Photos: Experts: Trained police needed for school security 3/3

This photo released by the Las Vegas Metropolitan Police Department shows Jake Benton Howell, 18, who was arrested with an unloaded assault rifle at a Las Vegas high school on Friday Dec. 21, 2012. The Las Vegas teenager has been linked by counterterrorism investigators to another local teen who federal authorities said stockpiled guns and explosives and spoke about staging a mass casualty attack. (AP Photo/Las Vegas Metropolitan Police Department)