The CADIZ didn’t begin until roughly Prince Rupert, which lay just to the south of the southeast Alaska panhandle, and so it seemed that there was a vast gap in the IZ system, at a rough guess maybe five hundred miles wide, between the Canadian and the American zones. Which, from a national defense standpoint, was not such a big deal, since it would only give the Russian bombers access to the upper bit of British Columbia, the Yukon, and the Northwest Territories. They could use their nukes to melt snow or kill mosquitoes, depending upon the season, but they couldn’t penetrate to the cities of Canada or the United States without passing through IZs farther south. And to reach that gap in the first place, they’d have to fly along an awkward southerly course that would burn a lot of fuel.