The memorandum by Donald Rumsfeld circulated we are told, to only four people, brings to mind the lesson my old friend and mentor, the strategist James Burnham, once told his fellow editors. "My father would say, pointing his finger one by one at the four people seated around his desk . . . So — John knows our secret, Jim knows it, Bruce knows it, and Andy knows it. That means," retracing the figures with his finger, "eleven hundred and eleven people know it." When Donald Rumsfeld became secretary of defense (for the second time) he marveled at how impossible...