The mother and baby in front of him quickly became covered in blood. By the time he realized what he had done, they were both dead.

¡°I pulled the trigger,¡± a former Japanese soldier who had fought in the 1945 Battle of Okinawa said. ¡°It appears in my dreams over and over. It¡¯s unbearable.¡±

One day in the summer of 2010, the former soldier, then in his mid-90s, visited a cave on Okinawa¡¯s main island with a group of war survivors.