joining us live now to talk about it, erica felix, professor of clinical psychology at uc santa barbara. professor felix, thanks for joining us. thank you for having me. it's an important conversation. i know you studied the effects of disasters, terrorism and mass shootings on our psyche. what happens to us when something like this happens ? >> well, when we see this on the news, we are compassionate people. we feel emotions like anxiety, worry, stress. we sometimes put ourselves mentally in the picture of a family member that might be experiencing this. because we are empathic people, and so it can take a toll even if we weren't directly there watching repeated media coverage of these mass shootings takes a toll on our mental health, and we've heard from students, teachers, parents that there is a constant worry about when the next mass shooting might happen and how they will all handle that. so people worry about that in places they go for enjoyment in their community, their schools, even though that out of all gun violence, mass shootings is the rarest one, they get so much media at