to come up tonight. There will be six fifteen-minute sections, or really four plus a half-hour one, if you combine "The Changing Middle East and the New Face of Terrorism -- I" and "The Changing Middle East and the New Face of Terrorism -- II." (Will the sequel beat the first episode?) That is joined by "Our longest war -- Afghanistan and Pakistan" and "Red Lines -- Israel and Iran." There's a general "America's role in the world" and then "China and Tomorrow's World," and that is that. Missing are Latin America (and Canada, for that matter), sub-Saharan Africa, Europe, India, and Asia other than China. It might seem annoyingly completist to mention the omission of Oceania and Antarctica -- if global warming, and the radical changes in the polar regions, weren't such a matter of international urgency. ( Dylan Byers collected some dismayed reactions.) Perhaps they can all be squeezed into the catch-all section or the etcetera after China, but it seems all too possible that "America's Role" will be a shouting match about supposed apology tours, and that "Tomorrow's World" will mean "We'll talk about it tomorrow." If the only international institution that gets a real discussion is the Olympics, then Bob Schieffer will have failed. Another problem with the narrowness of the debate's scope is that we have heard the candidates on these topics before, and often. That is, of course, because they are important. But the rhetoric has been honed; in some cases, the rhetoric is