All federal buildings should have Active Shooter Detection Systems installed. At present the only way to know is when you hear the gunshots. This maybe too late to save more lives. With a detection system, the whole building is made aware at one time and then authorities can be notified automatically. This can same many lives. you are notified by alarms or with smartphone technology. An example of such a system is found at http://www.shooterdetectionsystems.com/products/guardian/ .
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