This week, U.S. President Barack Obama will travel to Mexico, where he will meet with his North American counterparts, Canadian Prime Minister Stephen Harper and Mexican President Enrique Peña-Nieto. David Petraeus and Robert Zoellick writ: "The summit points to a great strategic opportunity: 20 years after the North American Free Trade Agreement entered into force, all three countries have the chance to forge a new forward-looking agenda for North American competitiveness and integration and thereby increase the economic growth and global influence of each."