New Fears: The Return of a Superterrorist Feb. 5, 2007 issue - Before Osama bin Laden, there was Imad Mughniyeh. The Lebanese terrorist from Hizbullah was considered the most dangerous in the world. Now the White House worries that he's back, after years of lying low. Four serving U.S. intel and counterterrorism officials, anonymous when discussing sensitive material, said Mughniyeh is prominent in recent reporting from the field about Hizbullah activity. Bruce Riedel, a veteran Mideast expert recently retired from the CIA, told NEWSWEEK there is "no question he is heavily involved in [formulating] terrorist contingency plans in case of...