Here's a theory I've been rolling around in my head lately.  That autopsy photo that shows the top of the president's head, the one with a dark round spot in the hairline, has bothered me.  It's probably nothing because I simply cannot imagine the autopsy personnel completely overlooking it and saying nothing about it.  It doesn't appear on the autopsy face sheet.  So it was probably something innocent.  What, I don't know...a clot?  A speck?  It just sure seems perfectly round to me though.