Well, with regard to North American airspace, really what we see from a NORAD perspective are two types of threats. One would be the Operation Noble Eagle type of threat, which is a similar one to 9/11, where you have terrorists who have taken over some sort of civilian aircraft. The other would be the Russian aviation threat that is prevalent throughout the world, as we mentioned before, but for us specifically up north.
The one thing I would say about the Russians, although there is probably a low threat that they are going to conduct any sort of attack on North America, is that they do train to do that on a regular basis. They have improved their equipment, and their weapons are much more stealthy than they ever used to be. We need to stay in tune with technology.
With regard to the Operation Noble Eagle threat, we practise this on a regular basis, as we do to counter any Russian incursions into Canadian airspace, so we're very comfortable with the practice and procedures we put in place, the techniques we use, and the interoperability we have with the Americans.
From a world perspective we're quite happy here in North America that we have a pretty good solid program in place. I would suggest that it is much more dangerous outside of North America than it is inside.