Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.
Police say the suspect in the shooting at Arapahoe High School was looking for a particular teacher.
News that broke in The Situation Room: CNN's Brian Todd reports with the latest updates from the middle school shooting near Reno, Nevada.
After Tuesday's school shooting in Georgia where no one was killed or injured, Brian Todd looks into what measures schools have taken to protect students from shootings and how effective they have been.
News that broke in The Situation Room: Police say the man who opened fire inside an elementary school gained entry by following someone past the locked doors. CNN's David Mattingly reports live from the scene.
CNN's Brian Todd speaks with a security expert on how to prevent a school shooting.
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