Mapping risk and protective factors that may result in increased chances of survival or a decrease in injuries and fatalities in mass-casualty incidents (MCIs) is an important component in the process of emergency preparedness. While expert risk analyses are based on calculations of probability and damage, public estimates of risks more often are based on qualitative factors. It is important to understand how the public, and not just professional experts, perceive and react to the threat of MCIs whether they stem from natural causes or terrorism. Glenshaw et al provide valuable insight into the impressions and responses of a sample of individuals, both injured and uninjured who were involved in the Oklahoma City bombing. Their analysis helps us better understand what factors influenced the risk of injury to the individuals involved in the event. The main risk factor themes that emerged from the analysis included environmental glass, debris, and entrapment. Protective factors included knowledge of egress routes, shielding behaviors to deflect debris, and survival training. Building design and health status were reported as both risk and protective factors.