Post-traumatic stress disorder (PTSD) is a challenging condition with a collection of possible symptoms: nightmares, relentless harmful emotions (anger, fear, guilt), hypervigilance, flashbacks, and an amplified startle response. PTSD patients are at greater risk of suicide. About 80-percent of the afflicted also suffer from other psychiatric problems (depression, alcoholism, drug abuse). Some causes of PTSD are rape, combat exposure, child abuse,...