I heard a story, as the only way I can get my reading-for-fun fix these days is via audio format, and it was about a soldier who was just-ever-so-upset for having shot another American during a riot. "Why, man, why? We're not supposed to shoot other Americans?" the forgettable soldier whines. Who, exactly, are you supposed to shoot and not feel terrible? Space creatures? Rabid camels? Because, l…