This is an example of a phenomenon we might: call resonating trauma. Resonating trauma occurs when an initial traumatic event creates such fear and anxiety that rumors of future similar events affect many communities, even communities far away and with far different conditions. Resonating trauma can be seen as the effect of a traumatic event on collective behavior. The very nature of a traumatic event is that it challenges one's assumptive world-the basic beliefs that one has about the world. Most individuals believe that the world is relatively benevolent and events occur for a reason. The massacre at Littleton deeply challenged that sense of safety, offering a reminder that even adolescents in school are not free from the danger of random violence.