A lone person stands on a hill overlooking Columbine High School prior to a memorial service on the third anniversary of the tragedy at Columbine High School in Littleton, Colo., April 20, 2002.
Sean Graves, shown in Littleton, Colo., Thursday, April 1, 2004, talks about being shot during the Columbine High massacre in April 1999. The attack remains the deadliest school shooting in U.S. history.
Principal of Lewis and Clark High School, Jon Sweet, stands outside the front doors of the school April 13, 2004, in Spokane, Wash. Sweet was principal when a 16-year-old student, brought a handgun to school and was critically wounded after being shot by police Sept. 22, 2003. After the Columbine High School shootings in Colorado five years ago, Spokane Public Schools had new procedures in place for dealing with guns in schools.
Dan Johnson, a district resource officer at Lewis and Clark High School, stands in a hallway at the school during lunch break April 13, 2004, in Spokane, Wash. After the Columbine High School shootings in Colorado five years ago, Spokane Public Schools had new procedures in place for dealing with guns in schools.
Michael Moore poses with the Oscar he won for best documentary feature for the film "Bowling for Columbine" during the 75th annual Academy Awards, March 23, 2003, in Los Angeles. The film focused on the problem of gun violence in America.
Director Gus Van Sant speaks at a press conference in Portland, Ore., Oct. 4, 2003, prior to the premiere of his film "Elephant." The movie, which which won both best film and best director awards at the Cannes Film Festival, dramatizes a fictional account of the Columbine shootings.
John Robinson, left, Nathan Tyson and Carrie Finklea speak about their roles in Gus Van Sant's film "Elephant" before its premiere in Portland, Ore., Oct. 4, 2003. "Elephant," based on a fictional version of the Columbine High School shootings, was filmed in Portland using local high school students in main roles and as extras.
A chime blows in the wind as it hangs from a tree, at a memorial site for the teacher and 12 students who died during the Columbine High School massacre, at Chapel Memorial Gardens near Littleton, Colo., April 19, 2003. Crosses in memory of those who died are pictured in the background.