" the Americans may no longer be interested in Canada’s participation, said Prof. Charron"

That's about right. Canadians should not take themselves so seriously. PM Martin, PM Dithers and his record was an example of typical Liberal short sited political expediency. The current PM is the same. Instead of having foresight, planning for the future of his country and doing what all European countries like Germany, Netherlands, Poland, Denmark are doing currently with a missile defence system, Dithers was wringing his hands worried and fretting about what a bunch of apprentice students in Quebec thought. US doesn't need Canada's approval for anything. If Canadians think their nation has ever had any sovereignty, think again. Canada is on its own. Canadian territory will always be at the disposal of US strategy. If Canada doesn't like that then Canadians should do something about it.( which wouldn't be much )