Ha! Ha! Ha! (Gasp!)

No, U.S., the reason people don't sneak across the border to blow things up in Canada is because the World likes Canada and does not fear us! We have not invaded and conquered anyone lately. We are not a terrorist power. We don't threaten people with attack all the time.

It's the same reason that they don't sneak across the border and blow up things in Denmark, Sweden, Norway, etc...

And, by golly, there ARE things worth blowing up here! Yeah, baby! Several of them have already been mentioned, but one hasn't: the World's largest remaining supplies of pure, fresh water.

It's something your government is busily figuring out how to get (steal) for themselves, since the USA is running out of fresh water fast.