Shaun Stanley, The Denver Post
Hyoung Chang, The Denver Post
Shaun Stanley, The Denver Post
Shaun Stanley, The Denver Post
Craig Walker, The Denver Post
Craig F. Walker, The Denver Post
Shaun Stanley, The Denver Post
Craig F. Walker, The Denver Post
KCNC-TV Denver, The Associated Press
Craig F. Walker, The Denver Post
John Prieto, The Denver Post
Brian Brainerd, The Denver Post
Brian Brainerd, The Denver Post
Craig F. Walker, The Denver Post
Karl Gehring, The Denver Post
Craig F. Walker, The Denver Post
Hyoung Chang, The Denver Post
Craig F. Walker, The Denver Post
Hyoung Chang, The Denver Post
Craig F. Walker, The Denver Post
Andy Cross, The Denver Post
Hyoung Chang, The Denver Post
John Epperson, The Denver Post
John Leyba, The Denver Post
Craig F. Walker, The Denver Post
John Leyba, The Denver Post
Andy Cross, The Denver Post
Brian Brainerd, The Denver Post
Karl Gehring, The Denver Post
Crissy Pascual, The Denver Post
Hyoung Chang, The Denver Post
Craig F. Walker, The Denver Post
Lyn Alweis, The Denver Post
Lyn Alweis, The Denver Post
Lyn Alweis, The Denver Post
John Leyba, The Denver Post
Craig F. Walker, The Denver Post
J. Scott Applewhite, The Associated Press
John Leyba, The Denver Post
John Leyba, The Denver Post
Karl Gehring, The Denver Post
Craig F. Walker, The Denver Post
Hyoung Chang, The Denver Post
Craig F. Walker, The Denver Post
Lyn Alweis, The Denver Post
George Kochaniec, Pool, The Associated Press
On April 20, 1999, two students, cloaked in black trench coats and armed with guns and pipe bombs, opened fire at Columbine High School, killing 15 people, including themselves, and wounding 28 others in the worst school shooting in U.S. history at the time.