Actually, this was being talked about a lot and was somewhat close to happening...before Sept. 2001. But obviously, that changed everything. They were calling it at that time a security perimeter - for around the the U.S., Canada and even potentially Mexico. Don't know how many details were fully worked out but it would have been great - also don't know if they worked out some of the details like for countries who needed visas for the U.S. but not Canada, etc. But the idea was kind of like a schengen zone - imagine how much time that would save travelers leaving YYZ for the U.S. at peak times. Alas, correct, now this is all fantasy.