December 8, 2002 Europeans Fear That the Threat From Radical Islamists Is IncreasingBy ELAINE SCIOLINO and DESMOND BUTLER ARIS, Dec. 7 — Political leaders and police investigators across Europe have concluded that the threat of terrorism from Al Qaeda and other radical Islamic groups is more serious than they had earlier assumed and may take years to neutralize.Recent recorded messages attributed to Osama bin Laden and his deputy, Ayman al-Zawahiri, that cite Europe as a target have prompted politicians to put the continent on alert. Recent arrests in Europe, particularly in France and the Netherlands, have underscored the extent...