Am I confident? I'm confident that we can risk-manage this. We're looking at developing technologies that will give us a higher degree of confidence when some of the challenges to operating submarines diminish. We continue to look at vulnerabilities and try to adjust to them.
I don't want to give the impression, after discussing all the challenges, that it would be impossible for a submarine to actually operate up in our north; in fact, it would be possible for a submarine to operate in our north. We take that seriously. If we get an indication that there may be submarines operating in the north, of course we'll react to them, but at this point I feel confident that we have enough of a network of intelligence, sensors, and response platforms that we know what's going on up in our north.