Dan had trouble adjusting after returning home from war. Loud noises like trash trucks would trigger alarms in his brain. He struggled to concentrate at work and had trouble sleeping. However, after a couple weeks he slowly returned to normal. The document also describes other veterans' experiences with flashbacks, nightmares, panic from loud noises or crowds, inability to sleep more than a few hours, and feeling like they were choking. Speaking to others about their experiences was difficult.