Disasters, such as war, terrorism, and natural disasters, affect individuals, groups, and communities. Although the focus is often on post-traumatic stress disorder (PTSD), it is only one of many potential responses to traumatic experiences. Fostering community and individual resilience can help mitigate the effects of disaster. Research, education, and early intervention are integral tools to inform an effective response. The Center for the Study of Traumatic Stress (CSTS) at the Uniformed Services University of the Health Sciences ascribes to such a model in its approach. Recent studies confirm that appreciation of biology and its relation to trauma response are necessary to our understanding of trauma's effects on humans, including trauma-associated disorders, resiliency, and recovery.