A new message threatening Italy with attacks involving surface-to-air missiles or poisonous substances has appeared on Islamic internet forums linked to the al-Qaeda terror network. The threat is made under the name of Sayf al-Adel, one of al-Qaeda's main leaders, who disappeared after the US invasion of Afghanistan and who, experts believe, is currently in hiding or in prison in Iran. Both the title and the content of the message make reference to a news story reported a couple of weeks ago, about rumours that Osama bin Laden had been killed in the earthquake which struck Pakistani Kashmir last month....