David Westin: This is "Wall Street Week." I'm David Westin bringing you stories of capitalism. We've heard all about how AI will change our world in ways we have yet to imagine, but we were surprised to find another side of the argument, a leading expert who thinks we may be getting it all wrong. And President Trump hasn't made too many friends in Canada during his second term.We go north of the border to get Canadians' perspectives on what's happened to America's other special relationship. Plus, Australia ...