Paul Williams has lived in Pennsylvania all his life. Yet with pretrial proceedings that begin today, Canadian libel laws now threaten to ruin him financially. Williams is a National Book Award-winning writer whose 2006 éxposé, "The Dunces of Doomsday," revealed potential terrorist threats to the United States emanating from McMaster University in Ontario, Canada. Although the book was published only in the US, he's being sued for libel in Canada by the university, which is demanding an apology and $2 million in damages. Williams is just the latest entry on an increasingly long list of victims of "libel tourism" - a list that includes me.