Patrick Neville was a 15-year-old sophomore at Columbine High School in 1999. He was on his way to a fast food lunch when the shooting started.
Two students, armed with guns and pipe bombs, had stormed the Colorado school, on their way to killing one teacher and 12 students — some were Neville's friends.
Neville, now a Colorado state representative, says many of Columbine's teachers and faculty acted heroically that day.
But, he says, "I truly believe that had some of them had the legal authority to be armed, more of my friends might be with me today."