The Canadian military was preparing on Saturday to evacuate a remote community of 600 people threatened by forest wildfires that have spread, choking smoke across a broad swathe of the United States. Federal Emergencies Minister Eleanor Olszewski said late on Friday that the armed forces would use aircraft to evacuate the inhabitants of Fort Hope in sparsely populated northwestern Ontario, where some of the most intense fires are burning. The region has few roads and relies heavily on air...