UNITED NATIONS - The U.S. government expelled an Iraqi journalist who covers the United Nations (news - web sites) for the official Iraqi News Agency because he was considered "harmful to the security of the United States," the journalist and U.S. officials said Friday. Mohammed Allawi, who has reported from the United Nations for the past two years, said he received the expulsion letter signed by U.S. Ambassador John Negroponte at his Manhattan home on Thursday. The letter said that he and his family, including his five children, had 15 days to leave the United States. "The letter say I...