Sister Mary Gianna, formely Jenica Tornby and a Columbine High School graduate, visits the Columbine Memorial at Clement Park in Littleton, Colorado,...
Students from Columbine High visit the Columbine Memorial at Clement Park in Littleton, Colorado, before a community vigil for the 20th anniversary...
Heidi Cortez, Columbine survivor, turns away after speaking at a press conference, ahead of the 20th anniversary of the Columbine High School...
Police stand outside the east entrance of Columbine High shool as bomb squads and SWAT teams secure students 20 April 1999 in Littleton, Colorado,...
Littleton, Colorado: Students run out of the Columbine High School as 2 gunmen went on a shooting spree killing fifteen, including themselves.
Students run from Columbine High School run under cover from police 20 April 1999 in Littleton, Colorado, after two masked teens on a "suicide...
Police patrol outside Columbine High School on April 17, 2019 in Littleton, Colorado, as all Denver-area schools were evacuated and classes cancelled...
At the Denver Civic Center Amphitheater, at a candlelight vigil for victims of the Columbine HS shootings, Tamara Tatar writes her sentiments on a...
Mourners fill the Mann Theater parking lot at memorial service for victims at Columbine High School in Littleton, Colo., where two teenagers shot to...
Students gather at the Light of the World Catholic Church for a memorial service honoring the victims of the Columbine High School shooting. On April...
View of flowers and tokens left at a makeshift memorial in remembrance of 13 victims at Columbine High School, Littleton, Colorado, April 21, 1999....
Little over 100 North Yarmouth Academy students from the middle and upper school line Main Street in Yarmouth during a student-organized silent...
Grieving students gather outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before...
Mourners attend memorial service in the Mann Theater parking lot for victims at Columbine High School in Littleton, Colo., where two teenagers shot...
Field of flowers covers the ground after memorial service in the Mann Theater parking lot for victims at Columbine High School in Littleton, Colo.,...
Incoming Columbine High School freshmen Ava Kyle and Ellie Fairweather, both of Littleton, Colorado, place flowers atop the Columbine Memorial in...
Two unidentified young people help another unidentified Columbine High School student to a bus after she escaped safely with other students from the...
Amber Johnson writes a note for the Columbine High School shooting victims with friends Jessi Wilson Kira Osado and Krystal Osado 26 April 1999 at...
Police patrol outside a locked Columbine High School on April 17, 2019 in Littleton, Colorado, as all Denver-area schools were evacuated and classes...
Youngsters weep at memorial to victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Youngster posts a sign at memorial to victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a...
People arriving for memorial to victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Woman weeps at park near Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before killing...
Grieving students mourn their friends outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Grieving students mourn their friends outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Grieving students console one another as they mourn victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12...
Grieving student weeps outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before killing...
Grieving student mourns for victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before...
Grief is etched in girl's face at memorial to victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and...
Students hold flowers and candles at prayer vigil for the victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12...
Students grieve at memorial to victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Memorial to victims is set up on hill near scene of massacre at Columbine High School in Littleton, Colo., where two teenagers shot to death 12...
Flowers are left as a memorial to the victims outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a...
Mourners weep for victims outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before...
Mourners weep at vigil for victims outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Mourners holds flowers at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before killing...
Mourners hold flowers at memorial for victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a...
Mourners grieve at memorial for victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Mourners gather for memorial to victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher...
Mourners console one another outside Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before...
Mourners attend memorial service in the Mann Theater parking lot for victims at Columbine High School in Littleton, Colo., where two teenagers shot...
Roses adorn fence near Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before killing...
Mourners arrive with flowers at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and a teacher before killing...
Mourner weeps at memorial in Clement Park for victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and...
Mourner weeps at memorial in Clement Park for victims at Columbine High School in Littleton, Colo., where two teenagers shot to death 12 students and...
Hearse leaves church after funeral services for Cassie Burnell, one of the students slain in massacre at Columbine High School in Littleton, Colo.,...
View of notes and tokens left at a makeshift memorial in remembrance of 13 victims at Columbine High School, Littleton, Colorado, April 21, 1999. Two...
View of crosses erected in remembrance of victims at Columbine High School, Littleton, Colorado, April 21, 1999. Two former students, Eric Harris and...
View of flowers and tokens left at a makeshift memorial in remembrance of 13 victims at Columbine High School, Littleton, Colorado, April 21, 1999....
View of flowers and tokens left at a makeshift memorial in remembrance of 13 victims at Columbine High School, Littleton, Colorado, April 21, 1999....
Young girl places flowers upon crosses erected in remembrance of victims at Columbine High School, Littleton, Colorado, April 21, 1999. Two former...
Columbine High School principal Frank DeAngelis at school, sharing in revival of school spirit despite scars left from last April's massacre by...
Columbine High School student Lance Kirklin, victim of student gunmen Eric Harris & Dylan Klebold in their April massacre at school who recovered...
Columbine High School student Brooks Brown at Perkins, his hangout, once suspected accomplice in April massacre at school by student gunmen Eric...
Columbine High School football team players during playoff game, one of targeted groups of student gunmen Eric Harris & Dylan Klebold in last April's...
Columbine High School student Mark Taylor, victim of student gunmen Eric Harris & Dylan Klebold in their April massacre at school, w. Mom Donna in...
Columbine High School student Richard Castaldo, victim of student gunmen Eric Harris & Dylan Klebold in their April massacre at school, in...
Swat team marksmen who were involved in police action during April massacre atColumbine High School by student gunmen Eric Harris & Dylan Klebold.
Columbine High School students praying in group evangelical Christian expression after trauma of April massacre at school by senior gunmen Eric...
Moment of silence observed during White House gun control event by Pres. Bill & Hillary Rodham Clinton , Education Secy. Richard Riley & Attorney...
