SNIPER ON THE COLUMBINE HIGH SCHOOL ROOF.

A suspected sniper on the roof of Columbine High School is shown in this photograph taken by school neighbor Brian Pain at 11:36 a.m. on April 20, 1999, while the deadliest school massacre in the history of the United States was taking place inside the building in Littleton, Colo. The photograph was included in a 700-page report released Monday, May 15, 2000, by the Jefferson County, Colo., Sheriff's Department of its investigation into the massacre. Photo by Jefferson County Sheriff's Dept., Brian Pain, File (AP).