Since the 1999 Columbine high school massacre in Colorado, there have been 84 mass shootings at schools across the United States. Each tragedy is uniquely horrific. But the response from lawmakers has ...
Aliza Chasan is a Digital Content Producer for "60 Minutes" and CBSNews.com. She has previously written for outlets including PIX11 News, The New York Daily News, Inside Edition and DNAinfo. Aliza ...
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