I think it should be re-evaluated, because if you want to move to a North American defence command, you have to have one with a partner that doesn't have a caveat. Right now we have the caveat that we will not defend against ballistic missiles. Therefore, that makes us not part of a full partnership.
On the element of time, my experience is that when there's a will from the government, there's a way, and it goes really fast. We went from zero to combat in Afghanistan with Chinooks inside a year. We acquired C-17s very fast. It's a matter of the funding and the will.
Our forefathers had the will to quickly build Cheyenne Mountain. That would cost billions, but if your survival is in doubt as a country, then you find the means and it goes faster. Political will makes it faster.