The United States and Canada expect to finish by next spring a study of potential replacements for the early warning radars positioned along the northern border of North America, according to the head of U.S. forces on the continent. Air Force Air Combat Command is working with Canada's armed forces on an analysis of alternatives for the North Warning System, according to Air Force Gen. Lori Robinson, the head of U.S. Northern Command. "We're just beginning that work and I...
