WASHINGTON - The frame surrounding an image of Abu Musab al-Zarqawi's head, revealed to the world as proof the terrorist is dead, is bizarre. When the picture was displayed at a U.S. military news briefing, Zarqawi's face was seen inside what appeared to be a professional photographic mat job, with a large frame, as if it were something one might preserve and hang on the wall next to other family portraits. One function of frames is to bound an image, and close down its open edges; frames delimit, both physically and by extension, metaphorically. But that was the last thing...