It's been that way for a number of years, albeit not with consistancy, but 9/11 changed that.
It has happened in both directions too. Canadians turned back because they have an inpaired driving conviction (DUI). Remember that it is a criminal offence.
In Canada we can get a pardon after 5 years of staying out of trouble.
Proud member of WTFDTSG Club.
Nice try means you suck spelled different.