<p>Dr. Melissa Brymer, Director of Terrorism and Disaster Programs at the UCLA Duke National Center for Child Traumatic Stress joined Megan Lynch discussing how intruder drills have evolved over the years. </p>

Dr. Melissa Brymer, Director of Terrorism and Disaster Programs at the UCLA Duke National Center for Child Traumatic Stress joined Megan Lynch discussing how intruder drills have evolved over the years.

<p>Dr. Melissa Brymer, Director of Terrorism and Disaster Programs at the UCLA Duke National Center for Child Traumatic Stress joined Megan Lynch discussing how intruder drills have evolved over the years.&nbsp;</p>

How have active shooter drills changed in schools over the years?

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How have active shooter drills changed in schools over the years?

How have active shooter drills changed in schools over the years?