Traumatic events, such as fire, earthquake, bombing, and hurricane, occur daily. Such devastatingcircumstances often cause an acute reaction of fear and terror for individuals who experience them. War, rape, and physical assault or abuse, whether of a child or an adult, produce equally frightening results, known as post-traumatic stress. It occurs when traumatized individuals cannot safely assign to the past what has happened in their life. The experience of trauma undermines one's expectations of safety and security in the world.