A sobering PDF book from the folks at the RAND Corporation, who subtly let the Air Force know that miscalculation is getting easier, not harder, in a world where the rules are no longer agreed between two guys at either end of a hotline.  The Air Force cannot be too happy to hear this. More than any other service, most of the punch that the air arm can deliver comes from strategic weapons, and this book appears to make a quiet case for even more careful control over weapons of mass destruction.