Schools in 3 states adding drones to combat active shooters

3 months ago 20
 Nearly 400,000 students have experienced gun violence at school since the 1999 attack at Columbine High School in Colorado, according to a Washington Post tracker, which has recorded 435 shootings over that period. (AP Photo/Ed Andrieski, File)

Schools in at least three states are adding pepper-spraying drones to their security to combat active shooter threats.

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