"The United States and Canada are deeply interconnected by history, geography, and our people. We have the largest bilateral trading relationship in the world, with two-way trade in goods and services of over $700 billion in 2012, supporting millions of jobs in each country. The United States and Canada also share the longest common border in the world, touching three oceans. Our shared border is more than a simple geographical boundary; it is also the site of more than 100 ports of entry, doors from one country to the other, where the efficient movement of people and goods is crucial to the daily lives of our citizens, the health of our communities and to the competitiveness of our economies. The United States and Canada have a long tradition of working together to promote security and facilitate trade and travel across our borders, ensuring that they remain open to legitimate trade and travel and closed to terrorists, criminals, and illegal or unauthorized goods. This strong partnership continues. The 'Beyond the Border Declaration: A Shared Vision for Perimeter Security and Economic Competitiveness' and its accompanying 'Action Plan,' announced by President Obama and Prime Minister Harper in 2011, deepen and institutionalize this cooperation at and away from the shared border."
The White House: http://www.whitehouse.gov/