<P>The events of 9/11 turned North American politics upside down. U.S. policy makers stopped thinking about how they could better integrate the economies of Mexico, Canada, and the United States and instead focused on security and sovereignty. Although security experts tend to view the developments that followed within a bilateral framework, <I>Game Changer</I> broadens the canvas by asking: How has America’s desire to keep its two borders closed to threats but open to trade influenced Canada and Mexico? By adopting a truly North American, or trilateral, framework, this authoritative volume suggests new approaches to security in the post-9/11 world.</P>