Northwestern and health officials discuss the difficulties in predicting violent threats on campus.

Northwestern students shared feelings of sadness and sympathy at Wednesday evening’s vigil for Virginia Tech.

Tonight’s vigil for those who died at Virginia Tech will include candles and brief speeches, but will focus on an open mic.

NBC News got a package from the Virginia Tech shooter.

The Washington Post illuminates the mind and behavior of Cho Seung Hui.

If you’ve already been following the news, a few must-read stories to help begin understanding what happened yesterday:
One emerging angle is how violent and disturbing the shooter’s creative writing was. You can read two plays that Cho Seung-Hui wrote at VT for yourself; they are sickeningly gripping for the anger and fury that runs [...]