"(A)ny future defense secretary who advises the president to again send a big American land army into Asia or into the Middle East or Africa should 'have his head examined,' as Gen. MacArthur so delicately put it," Robert Gates has just told the cadets at West Point. America would be nuts, Gates is saying, to fight a new land war like the two he inherited.It follows that the "neo-isolationists" who opposed invading Iraq and a "long war" in Afghanistan were right, in Gates' eyes. Quite an admissi...