Charles Figley, a psychologist and director of the Tulane University Traumatology Institute, says thinking too much about traumatic events, whether it's a refugee crisis on the other side of the world or a school shooting in our own country, can make people too anxious or depressed to function in their daily lives. Figley says, "It's a natural response called compassion fatigue. We of course think about ourselves being in such a place, in which someone would suddenly burst in and shoot things up, but if we think about that too much, then it deteriorates our sense of confidence and our sense of trust and our sense of safety."