A crisis often presents governments with an opportunity that can be either seized or missed. One lost chance came shortly after 9/11, when Mexico asked Canada to jointly negotiate a smart border agreement with the United States, as a way of ensuring that our respective land borders be kept as open as possible under Homeland Security concerns to trade in goods and services. Canada rejected the idea of working together in favour of a separate bilateral negotiation with Washington, mainly because it felt its own relationship with the United States was so special that including Mexico would only contaminate the process with issues extraneous to Ottawa's agenda. The result: two nearly identical agreements, signed six months apart, that could have been one of the first trilateral successes...