I would only add that Canada joined the consensus on missile defence for European nations. That was very clear, and it was very clearly specified that Canada agreed to that because of the sensitivities of North America, of course. I know that it signed up to missile defence for European nations.
In terms of the common funding, I would agree with Kevin. It's all part of the common funding formula, so that would be how Canada would contribute, and not the least through command and control systems.