25 years after the Columbine High School shooting, trauma lingers AxiosBiden marks 25th anniversary of Columbine shooting The Hill25 Years After Massacre, Principal Says Names of Columbine Victims’ Every Morning (Exclusive) PEOPLEA quarter-century after Columbine killings, survivors and community members gather to process their grief and ‘never forget’ Colorado Public RadioOver 1000 Columbine community members volunteer for day of service 25 years after school shooting CBS News