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.
Inside ColumbineAs the assault raged, students fought to keep a wounded teacher alive.
"God I Want to Torch and Level Everything"Columbine killer Eric Harris plans the massacre.
Psychopath? Depressive? Schizophrenic?Was Cho Seung-Hui really like the Columbine killers?