 Persons considered at risk include combat military personnel, victims of natural disasters, concentration camp survivors, and victims of violent crime.Persons employed in occupations that expose them to violence (such as soldiers) or disasters (such as emergency service workers) are also at risk.Other occupations that are at higher risk include police officers, firefighters, ambulance personnel, health care professionals, train drivers, divers, journalists, and sailors, in addition to people who work at banks, post offices or in stores.