I think it depends on what you would think is imminent. When we talk about threats, threat talks to capability and intent, so there are potential adversaries that have the capability, and on any given day may or may not have intent.
There is a real threat to Canadian sovereignty, without a doubt. The question is, is that likely to occur tomorrow or the week after? From my experience, I don't think we're very good at predicting things, whether that's the fall of the Berlin Wall, whether that's 9/11 and the 10 subsequent years of asymmetric battle, or Crimea, for that matter.
The Ukrainians got rid of their nuclear weapons in a pact with Russia, with the precise assurance that Ukrainian sovereignty would remain sacrosanct. That happened virtually a couple of weeks after the Sochi Olympics were right in that backyard.
My job is not to necessarily anticipate all those things; it's to be ready for them. When I think about the posture that NORAD has, and the requirement to protect Canadian sovereignty, there are threats out there without a doubt.