Topics Treated: The other side of chaos: understanding the patterns of posttraumatic responses; Multiple stressors following a disaster and dissociative symptoms; Exposure to traumatic death in disaster and war; Posttraumatic responses in spouse/significant others of disaster workers; Comorbidity of posttraumatic stress disorder and depression; War-related psychopathology in Kuwait: an assessment of war-related mental health problems; Children of the storm: a study of school children and Hurricane Andrew; Persistence of PTSD in former prisoners of war; Comorbidity of substance abuse and PTSD; Posttraumatic stress disorder and the risk of traumatic deaths among Vietnam veterans; Combat exposure and PTSD among homeless veterans of three wars; Acute to chronic: etiology and pathophysiology of PTSD -- a biopsychological approach; Neurobiological alterations in PTSD: review of the clinical literature.