‘It’s just America': Columbine's former principal on gun control and trauma

“I assumed it was a prank,” he said. “Someone has a paintball gun or firecrackers – never in my life did I think it would be a school shooting.” Ed Pilkington, writing in the Guardian speaks with Frank DeAngelis, principal of Columbine, who, not in spite of, but because of, stayed on 15 years later, until 2014.