Originally Posted by Swanhunter
I go through the US about 8 times a year for a variety of reasons and have only had a problem once. This was on an old passport, with lots of stamps from the Middle East which attracted attention and got me a secondary screening. That was a couple of years ago at YYZ. While rather embarassing, it hasn't done any lasting damage to my immigration file.
YYZ ? Does canadians share their immigration system with American ? (it's really a question, I read somewhere else on these boards that you could pass immigration before boarding at some canadian airport, how does it work ? Are you cleared by US or canadian LEO ?)