Columbine High School massacre

His family said Eubanks, 37, “lost the battle with the very disease he fought so hard to help others face.”

Since 1999, American schools have tried to prevent a threat that had once been unthinkable.

There has been an average of 10 school shootings a year since.

On 20 April 1999, two teenagers entered Columbine High School in Colorado with guns and explosives. They killed 12 students and a teacher, before turning their weapons on themselves. The event changed American classrooms forever, with school security becoming a multi-billion dollar industry. Now that many Columbine shooting survivors are parents themselves, they are facing the repercussions of the tragedy everyday.