Since Columbine in 1999, Colorado continues to be scarred by gun violence

For nearly three decades, Colorado has experienced some of the highest-profile shootings in the nation – tragedies that claimed the lives of ordinary Americans sitting in classrooms or movie theaters, shopping for groceries or dancing at a nightclub.

​ For nearly three decades, Colorado has experienced some of the highest-profile shootings in the nation – tragedies that claimed the lives of ordinary Americans sitting in classrooms or movie theaters, shopping for groceries or dancing at a nightclub. Read More Breaking News, Latest News and Videos | CNN