St. Louis, MO (KSDK) - Whether it's Kirkwood or Aurora, Colorado, these things all have one thing in common: immense trauma to a community brought on by one lone shooter.

NewsChannel 5 contacted Tara Galovski, an assistant professor of psychology at University of Missouri St. Louis, to join us for a couple of minutes during our First @ 4 broadcast to try to help us all wrap our minds around this day.

A suburban movie theater is a place people are supposed to be able to feel safe.

The typical reaction to a mass shooting in a public place is to tighten security where these kinds of things happen. And now it seems like you can't go anywhere without a security check, does that have any effect on how we interact with each other?

KSDK