To walk through Columbine High School today is to be struck by the apparent normality of it all.
Students greet each other between classes.
A teacher jokes with a group of girls and boys in the hall. Band members tote instruments to practice. And those who lived through the killing cannot deny to themselves that their lives have been forever changed, reorganized around tragedy and loss. Assistant principal Chris Mikesell still has upsetting lapses of concentration. She is distressed by the holes in her memory of the day that Eric Harris and Dylan Klebold strode into the school and started shooting.