As I mentioned, there are the internal sources that we have talked about already, the taxation and the like. It's very difficult to switch those off. I think what Canada as a government and other governments around the world can do is to make sure that the external sources are restricted to the greatest extent possible.
Now, as has been pointed out, the Islamic State benefits much more from internal funding, but nonetheless external sources have played a role. So making sure that the countries that surround Syria and Iraq are standing by their international obligations, that they have the necessary capabilities to monitor financial flows, to monitor informal systems—remittance companies, for example—all those things need to be done in a united fashion, and at the moment they are not.