Must be Old Europe stirring up trouble: European terrorism analysts acknowledge that the U.S. and its allies are under threat by Al Qaeda, but some suggest that the White House is unnecessarily adding to public anxiety with vague and dated intelligence about possible attacks. Some in Western Europe suspect the administration is using fear to improve its chances in the November election. Terrorism experts say too much publicity about possible plots and raids of Islamic extremist networks, including the arrest of 13 suspects in Britain last week, could hurt wider investigations. American politicians have called for an examination of that contention.