Guest US:

It is easier to enter Canada and then enter the US. Fact is, today, there are thousands of places a guy could cross the border from here to there. I have ended up in the US numerous times by accident (once in Maine, once in Vermont and once in New York). All it takes is some bush skills or swimming skills, and anyone can get in on purpose. You and I both know that. It's not a question, really. However, as a mild reproof, it is not our responsibility to keep terrorists out of the USA. It is our responsibility to keep them out of Canada. From my perspective, neither your country nor my country is doing a very good job.