Probably the difference between the North Korean economy and the Iranian economy is North Korea is a much smaller, much less sophisticated economy. The result is that the effects, I think, are less felt because there are not large amounts of foreign purchases of North Korean goods or resources. North Korea has more trade and external economic relations with China than with any other country. The sanctions against North Korea have been in place for a number of years, and the result is that this is not a functioning economy. I think it's much harder.
I think sanctions are important. I think we need to keep them in place. I think the sanctions have prevented further problems that might have developed if we hadn't had them in place. In terms of having the impact such as the sanctions have had in Iran recently, it's quite different.