On the first question, I don't believe the U.S. has an agreement with any of the countries. They're certainly not currently in negotiations with Mercosur. Mercosur is in negotiations with the European Union and a number of other partners, but the U.S. isn't present there.
In terms of a gateway to the market, or at least in terms of our free trade agreements, we don't necessarily use any particular country as a gateway to the overall market, because our agreements are all bilateral. We have access duty free to a number of countries now—Peru, Colombia, Costa Rica, Chile, and some others to come soon—but those are all bilateral agreements. With Mercosur you could conceivably see a product entering that market as a customs union, and then having access to the four countries. But, again, it would still be subject to duty if that product left the Mercosur region and went elsewhere.