As of June 1, 2009, everybody visiting Canada needs a passport. This includes even good honest non-terroristic Americans driving around to see the other side of Niagara Falls.
This, of course, is stupid, over-reaction. The government lets anybody come in from Mexico, but makes it hard to visit Canada on a day trip.
We had thought we might make a run from Niagara Falls across Canada to Detroit on part of our expected summer tour of America. But I guess not now.
That plus gun regulations means I’ve got to say “Sorry Canada”.