OTTAWA -- American academic and former militant radical Bill Ayers won't be allowed to enter Canada, according to an association of university faculty who had asked him to speak at an upcoming conference. Ayers was scheduled to speak at a conference on higher education and to the media in Toronto on June 16, but the Ontario Confederation of University Faculty Associations said Wednesday Ayers won't be allowed to enter Canada. "Ontario's university professors and academic librarians are appalled that Canada's borders are becoming a barrier to the free exchange of ideas," stated Mark Langer, president of the faculty association. "Bill...