On Friday, Feb 16 -- shortly after the horrific Florida school shootings -- there was an "active shooter" scare on the campus of Califorinia State University Northridge, which is where I teach.

That moring, social media was in a frenzy over posted video indicating a THREAT to the campus. Students reported to me that there were helicopters overhead and that their friends were texting them about the possibility of an "active shooter" on the grounds of the university!