If you go to the Canadian/US border on I-5 north of Seattle, you'll come across the Peace Arch. This monument -- inscribed with the words "may these gates never be closed" -- has been one of the defining characteristics between Canada and United States: peace and allyship. But now, things are changing. We’re on the brink of a trade war just as a new Prime Minister steps in to lead our northern neighbor. Inside Sources finishes by discussing the future of the relationship between the US and Canada.