25 years after the Columbine High School shooting, trauma lingers AxiosA quarter-century after Columbine killings, survivors and community members gather to process their grief and 'never forget' Colorado Public RadioColumbine 25 years later: We remember the 13 lives lost FOX 31 Denver25 Years After Massacre, Principal Says Names of Columbine Victims' Every Morning (Exclusive) PEOPLE25 years later, family, friends of Columbine victims ask us to never forget 9News.com KUSA