WASHINGTON — The man, called only “WO” by his physicians, woke up on on March 14, 2005, at his military post in Germany. He headed to the gym, where he played a 45-minute round of volleyball, then returned to his office to answer a backlog of emails. In the afternoon he went to his dentist for a routine root canal. Every day since, WO wakes up thinking it’s the morning of March 14, 2005, believing he is still in Germany and this is the day of his dentist appointment. His life is something of a Groundhog Day in reverse. From...