Shortly after arriving at the University of Washington, I joined some new friends on a trip to nearby Vancouver, British Columbia.  It was my first trip outside the United States.

At the border, a guard asked how long we would stay in Canada.  Knowing it would be after midnight when we returned, I asked, "How late will we be able to get back across the border?"

"Any time, Ma'am," the guard said.  "We never close Canada."