Is Boston Like Columbine?Were the Tsarnaev brothers a “dyad” like Eric Harris and Dylan Klebold, with a charismatic leader and submissive follower?
The Four Most Important Lessons of ColumbineHow "leakage" and the "active shooter protocol" have prevented other tragedies.
"God I Want to Torch and Level Everything"Columbine killer Eric Harris plans the massacre.
Inside ColumbineAs the assault raged, students fought to keep a wounded teacher alive.
Psychopath? Depressive? Schizophrenic?Was Cho Seung-Hui really like the Columbine killers?