It’s been a decade since the tragic Colombine school massacre.On the morning of April 20, 1999, two students went on a deadly rampage with homemade bombs, shotguns and a rifle at the Colorado highschool. They killed 12 students and a teacher before committing suicide. It was not the first or the last tragedy of its kind, but it is the one that stands out most in people’s minds. Survivor Sean Graves was shot six times and spent time in a wheelchair but was determined to overcome: “My injuries didn’t make me who I am. It’s how I dealt with those injuries and what had happened to me early on when I was 15 that’s made me who I am today,” he said. While 13 families mourn their dead, life after the tragedy has also been a challenge for many of those who survived. Franck DeAngelis decided to stay on as principal after the shooting: “For them, the last time they were in this building on the 20th, they were stepping over dead bodies,” he said. “They were being held hostage in some of the classrooms. And so I’m there to give them support.” Sean Graves, along with some of the other survivors, will return to Colombine this year as he does every year. The school will be closed today as a mark of respect for the victims and a memorial service is being held this evening.