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PBS News Hour
Preparing for the worst, 20 years after Columbine
A Colorado deputy police chief and former SWAT member was on a law enforcement team outside Denver that responded to the 1999 mass shooting at Columbine High School. Two decades later, he teaches others, including his own daughter, who last year survived a gunman's deadly rampage, how to respond in mass shootings. John Ferrugia of Rocky Mountain PBS reports.
