Mass shootings poll -- your personal experiences with them

In HS I went to a summer program at the school where this happened and met/befriended several people who were there at the time.

https://www.washingtonpost.com/archive/politics/1992/12/16/student-held-in-shooting-rampage-at-massachusetts-school-for-gifted/f36452ea-3a1f-4201-9c0e-6acf750d3747/?utm_term=.002aa31964bf

A few years ago when I was working at a hospital the son of a former patient came in and shot/killed one of the Dr's in my department. I had to hide in a office with three colleagues for 45 mins while they said there was an active shooter in the hospital and we had no idea what was going on. It was very scary but that wasn't a mass shooting since he only shot one person?

I don't know how to answer.

Automatic thread bump. This poll's results are now in.