A quarter of a century after the Columbine High School shooting, the trauma from the attack has remained with survivors. Some have taken years to identify themselves as survivors since they were not physically wounded. The aftershocks — often unacknowledged in the years before mental health struggles were more widely recognized — led to some survivors suffering insomnia, dropping out of school, or disengaging from their spouses or families. But some have developed healthy ways to cope with the shadow of that horrific day through therapy and the support from an expanding group of fellow mass shooting survivors.