Former White House national security adviser says if John McCain becomes the next US president the world will move toward World War IV. Former US President Jimmy Carter's national security adviser Zbigniew Brzezinski criticized US officials in Senator McCain's camp for pushing the presumptive Republican nominee toward a radical foreign policy on issues such as Iran. Brzezinski described McCain's presidency as an 'appalling concept' as it would lead to the World War IV, arguing that from the viewpoint of figures surrounding the Arizona senator the Cold War counted as World War III. "Well, if McCain is president and if his...